Use your BIOS setup category called hardware monitoring to
display the voltage rails of your PC. Most times you can see
problems ( or pending ) if the values are close the +/- tolerances.

Whenever you turn on a device it experiences a "InRush Current"
which is a momentary spike. If your supply is marginal that spike
may have caused the PS to abruptly shut down. Usually a rated
voltage can have a +/-5% range in a PC.

"Clayton" <claytonbNOSPAM@xtra.co.nz> wrote in message
news:uRw%2315SkIHA.3940@TK2MSFTNGP05.phx.gbl...
> sorry, I should have mentioned, it has happenned 3 other times over the
> last 6 months
>
>
> "PD43" <pauld1943@comcast.net> wrote in message
> news:3isqu3tmmvopcbjm8rft8u4esamjgqc32o@4ax.com...
>> "Clayton" <claytonbNOSPAM@xtra.co.nz> wrote:
>>
>>>I am having problems with a computer, this morning I turned on the
>>>computer
>>>and once at the login screen as I am logging on the computer switches
>>>off, I
>>>have restarted again and it is fine, PSU problem?
>>
>> Wait to see if the problem continues.
>>
>> One instance isn't worth worrying about.
>