I have a Compaq CQ50-103NR laptop that is stuck in a perpetual load loop. I get the Compaq screen, followed by a choose your OS screen, then everything goes blank for a few seconds, a cursor pops up for a few blinks, and it all starts over again. I have done everything from hard starts with, and without the battery/power supply to every conceivable BIOS trick, but it will not boot the OS successfully. Is there a simple fix on the mother board or is this thing pretty much toast?