my 1525 will not boot up......... power light comes on , activity light flickers for about 4 seconds , the media lights flash as is suopposed to the the activity light goes out the power light stays on but nothing else just a black screen, ive tried all the command keys........ nothing works, the computer is one year two months old ........ they timed it just right...... thanks in advance........any and all help is welcome ............