I have Acer Travelmate 4052 laptop with Centrino 1.6 Ghz processor, I
took Hardisk from my PC to copy some data to my laptop and for that I
bought a 3.5 inch casing which came along with an adaptor. It went
well for a hour and copied some data but after that a message popup
saying POWER SURGE ON USB HUB and pulled the usb connector and
connector to the other remaing two ports alternatively but same
message. When I restarted my computer and try to connect as usual my
microsoft usb mouse, my system froze, nothing worked alt+crtl+del,
nothing, so restarted but same problem on other ports as well. I
reinstalled the USB controller but to no use, I updated the BIOS,
enable - disable USB legacy support and USB Mass Storage suporrt from
the BIOS but to no use. I tried to reinstall the same Winxp pro with
integrated SP2 which was earlier on the system but it froze too,
sometimes at intial copying of files after formating, sometimes at 34
min remaining screen, then at 9 min, and 5 min remaining to complete
the setup.

I consulted one very popular laptop repair shop and the technician
told me that it is a very common problem with computer and especially
laptops and your Intel 82801 DBM chip has to be replaced, there is no
alternative, and he was not sure whether it will be ok again, if not
he said then I have to replace the motherboard. As it was a costly
step, I tried many forum for help but to no avail. Nothing helped me
at all.

Finally, as I system as out of warranty and being a electronic
hobbiest myself, I took apart my laptop and tried something really
stupid. I placed my system in front of the airconditioner and
restarted the 39 min installation process and walla it did completed
successfully. Then I installed all the drivers successfully, I didnt
tried the USB at all that time but I noticed that my CPU was
constantly at 100% as the system was at IDLE state. I was sure about
any virus or malware as firstly after installing windows with SP2 i
updated the hotfixes and critical updates from AUTOPATCHER then
installed the Internet security suite then connected to internet to
update it, so I scanned and as expected nothing showed up. Then I
tried the SysInternal which is now owned by Microsoft, the Process
Explorer as no doubt the System was slow to 25% of its original speed,
I try to figure out by searching the running thread from Process
Explorer then I saw 4 threads which were taking all the CPU usage and
to no surprise these were USBPORT.SYS+0x5fe6 (ALL FOUR), when I try to
kill these threads, access was denied so I suspend them all and my cpu
immediately comes to actual idle state 2-5%.

I have not found any cure so far please help me. My system boots very
very slow then I have to wait for the desktop things to appear so that
I can open the Process Explorer to shut those USB threads and then I
can work.

Is it really the DBM chip fault which I read somewhere as Intel
SouthBridge 82801 DB ICH4-M. As I explained I tried everything so far
as I am a network engineer myself and electronic hobbiest so far
whatever I could, I tried but nothing. I even tried the PCMCIA usb
card, it did work once with mouse but didnt worked again. I asked the
same technician he said how can this PCMCIA card will work as it only
changes the Interface, controller on the motherboard still is the same
which has to work.

I tried to find the schematic so that I can check the voltages across
the MOBO but only could find the service manual that too for
Travelmate 290 which has identical motherboard.

Please please help me, I am sure that Google group can help me out
here.

INDI

"Indi" <sbrars******.com> wrote in message
news:1179270112.837051.203880@q23g2000hsg.googlegr oups.com
> I have Acer Travelmate 4052 laptop with Centrino 1.6 Ghz processor, I
> took Hardisk from my PC to copy some data to my laptop and for that I
> bought a 3.5 inch casing which came along with an adaptor. It went
> well for a hour and copied some data but after that a message popup
> saying POWER SURGE ON USB HUB and pulled the usb connector and
> connector to the other remaing two ports alternatively but same
> message. When I restarted my computer and try to connect as usual my
> microsoft usb mouse, my system froze, nothing worked alt+crtl+del,
> nothing, so restarted but same problem on other ports as well. I
> reinstalled the USB controller but to no use, I updated the BIOS,
> enable - disable USB legacy support and USB Mass Storage suporrt from
> the BIOS but to no use. I tried to reinstall the same Winxp pro with
> integrated SP2 which was earlier on the system but it froze too,
> sometimes at intial copying of files after formating, sometimes at 34
> min remaining screen, then at 9 min, and 5 min remaining to complete
> the setup.
>
> I consulted one very popular laptop repair shop and the technician
> told me that it is a very common problem with computer and especially
> laptops and your Intel 82801 DBM chip has to be replaced, there is no
> alternative, and he was not sure whether it will be ok again, if not
> he said then I have to replace the motherboard. As it was a costly
> step, I tried many forum for help but to no avail. Nothing helped me
> at all.
>
> Finally, as I system as out of warranty and being a electronic
> hobbiest myself, I took apart my laptop and tried something really
> stupid. I placed my system in front of the airconditioner and
> restarted the 39 min installation process and walla it did completed
> successfully. Then I installed all the drivers successfully, I didnt
> tried the USB at all that time but I noticed that my CPU was
> constantly at 100% as the system was at IDLE state. I was sure about
> any virus or malware as firstly after installing windows with SP2 i
> updated the hotfixes and critical updates from AUTOPATCHER then
> installed the Internet security suite then connected to internet to
> update it, so I scanned and as expected nothing showed up. Then I
> tried the SysInternal which is now owned by Microsoft, the Process
> Explorer as no doubt the System was slow to 25% of its original speed,
> I try to figure out by searching the running thread from Process
> Explorer then I saw 4 threads which were taking all the CPU usage and
> to no surprise these were USBPORT.SYS+0x5fe6 (ALL FOUR), when I try to
> kill these threads, access was denied so I suspend them all and my cpu
> immediately comes to actual idle state 2-5%.
>
> I have not found any cure so far please help me. My system boots very
> very slow then I have to wait for the desktop things to appear so that
> I can open the Process Explorer to shut those USB threads and then I
> can work.
>
> Is it really the DBM chip fault which I read somewhere as Intel
> SouthBridge 82801 DB ICH4-M. As I explained I tried everything so far
> as I am a network engineer myself and electronic hobbiest so far
> whatever I could, I tried but nothing. I even tried the PCMCIA usb
> card, it did work once with mouse but didnt worked again. I asked the
> same technician he said how can this PCMCIA card will work as it only
> changes the Interface, controller on the motherboard still is the same
> which has to work.
>
> I tried to find the schematic so that I can check the voltages across
> the MOBO but only could find the service manual that too for
> Travelmate 290 which has identical motherboard.
>
> Please please help me, I am sure that Google group can help me out
> here.
>
> INDI

As a temporary fix, why not disable the USB drivers under the Device
Manager? Then reboot. As that should keep it from eating CPU time. As
for the DBM chip, well that be bad. Can you live without USB ports on
this computer? Because fixing it doesn't sound worth it to me. :(

--
Bill

"Indi" <sbrars******.com> wrote in message
news:1179270112.837051.203880@q23g2000hsg.googlegr oups.com...
>I have Acer Travelmate 4052 laptop with Centrino 1.6 Ghz processor, I
> took Hardisk from my PC to copy some data to my laptop and for that I
> bought a 3.5 inch casing which came along with an adaptor. It went
> well for a hour and copied some data but after that a message popup
> saying POWER SURGE ON USB HUB and pulled the usb connector and
> connector to the other remaing two ports alternatively but same
> message. When I restarted my computer and try to connect as usual my
> microsoft usb mouse, my system froze, nothing worked alt+crtl+del,
> nothing, so restarted but same problem on other ports as well. I
> reinstalled the USB controller but to no use, I updated the BIOS,
> enable - disable USB legacy support and USB Mass Storage suporrt from
> the BIOS but to no use. I tried to reinstall the same Winxp pro with
> integrated SP2 which was earlier on the system but it froze too,
> sometimes at intial copying of files after formating, sometimes at 34
> min remaining screen, then at 9 min, and 5 min remaining to complete
> the setup.
>

Basically, the USB ports on your motherboard have failed. Why this is, is
unlikely to be become clear.

The easiest way out of this is to disable the existing USB ports in Device
Manager and fit a USB Cardbus card. It may require an external power brick
if anything wants power from the USB ports.

a POWER SURGE ON USB HUB indicates to me either an over current or over
voltage condition occurred. IF that is the case one must wonder it the
mobo voltage converter which supplies USB voltage/current is intact.
___
"Indi" <sbrars******.com> wrote in message
news:1179270112.837051.203880@q23g2000hsg.googlegr oups.com...
> I have Acer Travelmate 4052 laptop with Centrino 1.6 Ghz processor, I
> took Hardisk from my PC to copy some data to my laptop and for that I
> bought a 3.5 inch casing which came along with an adaptor. It went
> well for a hour and copied some data but after that a message popup
> saying POWER SURGE ON USB HUB and pulled the usb connector and
> connector to the other remaing two ports alternatively but same
> message. When I restarted my computer and try to connect as usual my
> microsoft usb mouse, my system froze, nothing worked alt+crtl+del,
> nothing, so restarted but same problem on other ports as well. I
> reinstalled the USB controller but to no use, I updated the BIOS,
> enable - disable USB legacy support and USB Mass Storage suporrt from
> the BIOS but to no use. I tried to reinstall the same Winxp pro with
> integrated SP2 which was earlier on the system but it froze too,
> sometimes at intial copying of files after formating, sometimes at 34
> min remaining screen, then at 9 min, and 5 min remaining to complete
> the setup.
>
> I consulted one very popular laptop repair shop and the technician
> told me that it is a very common problem with computer and especially
> laptops and your Intel 82801 DBM chip has to be replaced, there is no
> alternative, and he was not sure whether it will be ok again, if not
> he said then I have to replace the motherboard. As it was a costly
> step, I tried many forum for help but to no avail. Nothing helped me
> at all.
>
> Finally, as I system as out of warranty and being a electronic
> hobbiest myself, I took apart my laptop and tried something really
> stupid. I placed my system in front of the airconditioner and
> restarted the 39 min installation process and walla it did completed
> successfully. Then I installed all the drivers successfully, I didnt
> tried the USB at all that time but I noticed that my CPU was
> constantly at 100% as the system was at IDLE state. I was sure about
> any virus or malware as firstly after installing windows with SP2 i
> updated the hotfixes and critical updates from AUTOPATCHER then
> installed the Internet security suite then connected to internet to
> update it, so I scanned and as expected nothing showed up. Then I
> tried the SysInternal which is now owned by Microsoft, the Process
> Explorer as no doubt the System was slow to 25% of its original speed,
> I try to figure out by searching the running thread from Process
> Explorer then I saw 4 threads which were taking all the CPU usage and
> to no surprise these were USBPORT.SYS+0x5fe6 (ALL FOUR), when I try to
> kill these threads, access was denied so I suspend them all and my cpu
> immediately comes to actual idle state 2-5%.
>
> I have not found any cure so far please help me. My system boots very
> very slow then I have to wait for the desktop things to appear so that
> I can open the Process Explorer to shut those USB threads and then I
> can work.
>
> Is it really the DBM chip fault which I read somewhere as Intel
> SouthBridge 82801 DB ICH4-M. As I explained I tried everything so far
> as I am a network engineer myself and electronic hobbiest so far
> whatever I could, I tried but nothing. I even tried the PCMCIA usb
> card, it did work once with mouse but didnt worked again. I asked the
> same technician he said how can this PCMCIA card will work as it only
> changes the Interface, controller on the motherboard still is the same
> which has to work.
>
> I tried to find the schematic so that I can check the voltages across
> the MOBO but only could find the service manual that too for
> Travelmate 290 which has identical motherboard.
>
> Please please help me, I am sure that Google group can help me out
> here.
>
> INDI
>

"none" <nospam@bogusaddress.com> wrote in message
news:FJH2i.8686$ya1.2888@news02.roc.ny
> a POWER SURGE ON USB HUB indicates to me either an over current or
> over voltage condition occurred. IF that is the case one must wonder
> it the mobo voltage converter which supplies USB voltage/current is
> intact. ___

Yes, but USB specs even allows the USB device to be even a dead short,
and it isn't supposed to do anything bad, but just shut down the supply
safely until the load is removed. Well that is the way it is supposed to
work anyway. :)

--
Bill

BillW50 wrote:
> "none" <nospam@bogusaddress.com> wrote in message
> news:FJH2i.8686$ya1.2888@news02.roc.ny
>
>> a POWER SURGE ON USB HUB indicates to me either an over current or
>> over voltage condition occurred. IF that is the case one must wonder
>> it the mobo voltage converter which supplies USB voltage/current is
>> intact. ___
>
>
> Yes, but USB specs even allows the USB device to be even a dead short,
> and it isn't supposed to do anything bad, but just shut down the supply
> safely until the load is removed. Well that is the way it is supposed to
> work anyway. :)
>
But some have a fuse that needs replacing.

Ian Singer

--


================================================== =======================
See my homepage at http://www.iansinger.com
hosted on http://www.1and1.com/?k_id=10623894
All genealogy is stored in TMG from http://www.whollygenes.com
Charts and searching using TNG from http://www.tngsitebuilding.com
I am near Toronto Canada, can I tell where you are from your reply?
================================================== =======================

"Ian Singer" <iansinger@sympatico.ca> wrote in message
news:5b1d0pF2qrl2aU1@mid.individual.net
> BillW50 wrote:
>> "none" <nospam@bogusaddress.com> wrote in message
>> news:FJH2i.8686$ya1.2888@news02.roc.ny
>>
>>> a POWER SURGE ON USB HUB indicates to me either an over current or
>>> over voltage condition occurred. IF that is the case one must wonder
>>> it the mobo voltage converter which supplies USB voltage/current is
>>> intact. ___
>>
>>
>> Yes, but USB specs even allows the USB device to be even a dead
>> short, and it isn't supposed to do anything bad, but just shut down
>> the supply safely until the load is removed. Well that is the way it
>> is supposed to work anyway. :)
>>
> But some have a fuse that needs replacing.
>
> Ian Singer

I thought a fuse was diallowed by the spec? As the average consumer
isn't suppose to be in there anyway.

--
Bill

"BillW50" <BillW50@aol.kom> wrote in message
news:464ba442$0$18536$834e42db@reader.greatnowhere .com...
> "Ian Singer" <iansinger@sympatico.ca> wrote in message
> news:5b1d0pF2qrl2aU1@mid.individual.net
>> BillW50 wrote:
>>> "none" <nospam@bogusaddress.com> wrote in message
>>> news:FJH2i.8686$ya1.2888@news02.roc.ny
>>>
>>>> a POWER SURGE ON USB HUB indicates to me either an over current or
>>>> over voltage condition occurred. IF that is the case one must wonder
>>>> it the mobo voltage converter which supplies USB voltage/current is
>>>> intact. ___
>>>
>>>
>>> Yes, but USB specs even allows the USB device to be even a dead
>>> short, and it isn't supposed to do anything bad, but just shut down
>>> the supply safely until the load is removed. Well that is the way it
>>> is supposed to work anyway. :)
>>>
>> But some have a fuse that needs replacing.
>>
>> Ian Singer
>
> I thought a fuse was diallowed by the spec? As the average consumer isn't
> suppose to be in there anyway.
>

Correct. the over current protection must be, "... self reseting without
user intervention.".

"none" <nospam@bogusaddress.com> wrote in message
news:FJH2i.8686$ya1.2888@news02.roc.ny...
>a POWER SURGE ON USB HUB indicates to me either an over current or over
> voltage condition occurred. IF that is the case one must wonder it the
> mobo voltage converter which supplies USB voltage/current is intact.
>

Not necessarily. This failure mode is actually quite common. It is seldom
possible to work out what has caused the port to fail in a way to give this
error message. It should be pointed out that it is not the 5 volt supply
from the port that has a problem, but the one or both of the receivers on
the two data lines. The 5 volt supply will not be enabled if the host is
unable to enumerate the port.
___
> "Indi" <sbrars******.com> wrote in message
> news:1179270112.837051.203880@q23g2000hsg.googlegr oups.com...
>> I have Acer Travelmate 4052 laptop with Centrino 1.6 Ghz processor, I
>> took Hardisk from my PC to copy some data to my laptop and for that I
>> bought a 3.5 inch casing which came along with an adaptor. It went
>> well for a hour and copied some data but after that a message popup
>> saying POWER SURGE ON USB HUB and pulled the usb connector and
>> connector to the other remaing two ports alternatively but same
>> message. When I restarted my computer and try to connect as usual my
>> microsoft usb mouse, my system froze, nothing worked alt+crtl+del,
>> nothing, so restarted but same problem on other ports as well. I
>> reinstalled the USB controller but to no use, I updated the BIOS,
>> enable - disable USB legacy support and USB Mass Storage suporrt from
>> the BIOS but to no use. I tried to reinstall the same Winxp pro with
>> integrated SP2 which was earlier on the system but it froze too,
>> sometimes at intial copying of files after formating, sometimes at 34
>> min remaining screen, then at 9 min, and 5 min remaining to complete
>> the setup.
>>
>> I consulted one very popular laptop repair shop and the technician
>> told me that it is a very common problem with computer and especially
>> laptops and your Intel 82801 DBM chip has to be replaced, there is no
>> alternative, and he was not sure whether it will be ok again, if not
>> he said then I have to replace the motherboard. As it was a costly
>> step, I tried many forum for help but to no avail. Nothing helped me
>> at all.
>>
>> Finally, as I system as out of warranty and being a electronic
>> hobbiest myself, I took apart my laptop and tried something really
>> stupid. I placed my system in front of the airconditioner and
>> restarted the 39 min installation process and walla it did completed
>> successfully. Then I installed all the drivers successfully, I didnt
>> tried the USB at all that time but I noticed that my CPU was
>> constantly at 100% as the system was at IDLE state. I was sure about
>> any virus or malware as firstly after installing windows with SP2 i
>> updated the hotfixes and critical updates from AUTOPATCHER then
>> installed the Internet security suite then connected to internet to
>> update it, so I scanned and as expected nothing showed up. Then I
>> tried the SysInternal which is now owned by Microsoft, the Process
>> Explorer as no doubt the System was slow to 25% of its original speed,
>> I try to figure out by searching the running thread from Process
>> Explorer then I saw 4 threads which were taking all the CPU usage and
>> to no surprise these were USBPORT.SYS+0x5fe6 (ALL FOUR), when I try to
>> kill these threads, access was denied so I suspend them all and my cpu
>> immediately comes to actual idle state 2-5%.
>>
>> I have not found any cure so far please help me. My system boots very
>> very slow then I have to wait for the desktop things to appear so that
>> I can open the Process Explorer to shut those USB threads and then I
>> can work.
>>
>> Is it really the DBM chip fault which I read somewhere as Intel
>> SouthBridge 82801 DB ICH4-M. As I explained I tried everything so far
>> as I am a network engineer myself and electronic hobbiest so far
>> whatever I could, I tried but nothing. I even tried the PCMCIA usb
>> card, it did work once with mouse but didnt worked again. I asked the
>> same technician he said how can this PCMCIA card will work as it only
>> changes the Interface, controller on the motherboard still is the same
>> which has to work.
>>
>> I tried to find the schematic so that I can check the voltages across
>> the MOBO but only could find the service manual that too for
>> Travelmate 290 which has identical motherboard.
>>
>> Please please help me, I am sure that Google group can help me out
>> here.
>>
>> INDI
>>
>
>

"M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
news:464c0022$2_1@glkas0286.greenlnk.net
> "none" <nospam@bogusaddress.com> wrote in message
> news:FJH2i.8686$ya1.2888@news02.roc.ny...
>> a POWER SURGE ON USB HUB indicates to me either an over current or
>> over voltage condition occurred. IF that is the case one must wonder
>> it the mobo voltage converter which supplies USB voltage/current is
>> intact.
>
> Not necessarily. This failure mode is actually quite common. It is
> seldom possible to work out what has caused the port to fail in a way
> to give this error message. It should be pointed out that it is not
> the 5 volt supply from the port that has a problem, but the one or
> both of the receivers on the two data lines. The 5 volt supply will
> not be enabled if the host is unable to enumerate the port.

I see an error message if I use the USB webcam and the USB TV tuner card
at the same time. Although it only flashes for a half of a second when I
plug the last one in and then both are operating just fine. I don't use
them on a hub, but rather my laptop has 4 built in USB ports. I would
never purchase a laptop without at least 4 USB ports on it. :)

--
Bill

"BillW50" <BillW50@aol.kom> wrote in message
news:464f4afc$0$18537$834e42db@reader.greatnowhere .com...
> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
> news:464c0022$2_1@glkas0286.greenlnk.net
>> "none" <nospam@bogusaddress.com> wrote in message
>> news:FJH2i.8686$ya1.2888@news02.roc.ny...
>>> a POWER SURGE ON USB HUB indicates to me either an over current or
>>> over voltage condition occurred. IF that is the case one must wonder
>>> it the mobo voltage converter which supplies USB voltage/current is
>>> intact.
>>
>> Not necessarily. This failure mode is actually quite common. It is
>> seldom possible to work out what has caused the port to fail in a way
>> to give this error message. It should be pointed out that it is not
>> the 5 volt supply from the port that has a problem, but the one or
>> both of the receivers on the two data lines. The 5 volt supply will
>> not be enabled if the host is unable to enumerate the port.
>
> I see an error message if I use the USB webcam and the USB TV tuner card
> at the same time. Although it only flashes for a half of a second when I
> plug the last one in and then both are operating just fine. I don't use
> them on a hub, but rather my laptop has 4 built in USB ports. I would
> never purchase a laptop without at least 4 USB ports on it. :)
>

Hmm. I can only assume that the port is flagging the problem to the host
and then recovering to operate normally. If it is not inconveniencing
normal operation, then just ignore it.

"M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
news:465145c7$1_1@glkas0286.greenlnk.net
> "BillW50" <BillW50@aol.kom> wrote in message
> news:464f4afc$0$18537$834e42db@reader.greatnowhere .com...
>> I see an error message if I use the USB webcam and the USB TV tuner
>> card at the same time. Although it only flashes for a half of a
>> second when I plug the last one in and then both are operating just
>> fine. I don't use them on a hub, but rather my laptop has 4 built in
>> USB ports. I would never purchase a laptop without at least 4 USB
>> ports on it. :)
>
> Hmm. I can only assume that the port is flagging the problem to the
> host and then recovering to operate normally. If it is not
> inconveniencing normal operation, then just ignore it.

I think of it is both the webcam and the TV tuner uses the max 500ma.
And when you first plug them in, there is a surge which probably hits it
over 500ma sometimes. Thus the problem is flagged just for a split
second. But then it instantly recovers.

--
Bill

"BillW50" <BillW50@aol.kom> wrote in message
news:465167c9$0$18534$834e42db@reader.greatnowhere .com...
> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
> news:465145c7$1_1@glkas0286.greenlnk.net
>> "BillW50" <BillW50@aol.kom> wrote in message
>> news:464f4afc$0$18537$834e42db@reader.greatnowhere .com...
>>> I see an error message if I use the USB webcam and the USB TV tuner
>>> card at the same time. Although it only flashes for a half of a
>>> second when I plug the last one in and then both are operating just
>>> fine. I don't use them on a hub, but rather my laptop has 4 built in
>>> USB ports. I would never purchase a laptop without at least 4 USB
>>> ports on it. :)
>>
>> Hmm. I can only assume that the port is flagging the problem to the
>> host and then recovering to operate normally. If it is not
>> inconveniencing normal operation, then just ignore it.
>
> I think of it is both the webcam and the TV tuner uses the max 500ma. And
> when you first plug them in, there is a surge which probably hits it over
> 500ma sometimes. Thus the problem is flagged just for a split second. But
> then it instantly recovers.
>

The USB specification requires a port to cater for this situation, but it
just might be that your combination is marginal.

"M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
news:465189b2$1_1@glkas0286.greenlnk.net
> "BillW50" <BillW50@aol.kom> wrote in message
> news:465167c9$0$18534$834e42db@reader.greatnowhere .com...
>> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
>> news:465145c7$1_1@glkas0286.greenlnk.net
>>> "BillW50" <BillW50@aol.kom> wrote in message
>>> news:464f4afc$0$18537$834e42db@reader.greatnowhere .com...
>>>> I see an error message if I use the USB webcam and the USB TV tuner
>>>> card at the same time. Although it only flashes for a half of a
>>>> second when I plug the last one in and then both are operating just
>>>> fine. I don't use them on a hub, but rather my laptop has 4 built
>>>> in USB ports. I would never purchase a laptop without at least 4
>>>> USB ports on it. :)
>>>
>>> Hmm. I can only assume that the port is flagging the problem to the
>>> host and then recovering to operate normally. If it is not
>>> inconveniencing normal operation, then just ignore it.
>>
>> I think of it is both the webcam and the TV tuner uses the max
>> 500ma. And when you first plug them in, there is a surge which
>> probably hits it over 500ma sometimes. Thus the problem is flagged
>> just for a split second. But then it instantly recovers.
>
> The USB specification requires a port to cater for this situation,
> but it just might be that your combination is marginal.

Yes, but it doesn't seem like a big deal. The only problem I have from
time to time is sometimes the TV Tuner InterVideo WinDVR 1.8 thinks the
webcam is the source and not the KWorld USB TV Tuner. Although closing
it down and unplugging the webcam fixes it. WinDVR does have an option
to select the source, but it lists nothing (or is grayed out, I don't
remember now). I believe KWorld software has their own funny way of
making WinDVR work with it. As it came with WinDVR. :)

--
Bill

Good day,
I have a similar problem. ACER Aspire 1705. I tried to connect once a
hand made usb cable and since then 3 out of the 4 usb are not working.
One of them was giving still power till last week but couldn't read.
The 4th one kept working for 3 years, until last week, where something
happened and both stopped working.
Not having a USB, I tried a PCMCIA to USBx4 card. The card freezes my
PC when I'm using a USB stick. I attached the extra 5V power, I
installed the correct drivers but nothing.
I need your precious advise on the following:

1. Is there any way to see what really happened to my 4 USB?Even if
they were fried, is there a software who will show that, so I could talk
with evidence and not with assumptions? Any way to repair these USB?
2. Is there a way to make the PCMCIA work perfectly? I have seen many
people having the same problem with USB-PCMCIA cards
3. Is there any other way to get a more reliable USB to mount my
external sound card?

Please advise, you are my last faith.