I have a Dell Inspiron 1525, which suddenly died, while it was in use.
Rebooting does nothing, POST is not completed, so the BIOS won't start up. Num lock and scroll lock are permanently lighted and caps lock is flashing. I found some diagnostic codes lists, which suggest a memory error, but replacing the memory doesn't help. I also replaced the cell coin battery on the motherboard, but the problem still exists. Battery or AC-power doesn't make any difference.
Most weird: when it is down for about a day, it completes the POST after booting. I was able to view the BIOS, but after a couple of seconds the laptop went out.
Does anybody have any new suggestions?