I got a serious problem with my hp dv5-1112el running in vista.
A couple of days ago I have got this problem when I start the lap-top it going on until past the bios presentation I mean
after showing me " press the esc key to start-up the menu..." than after that nothing just showing the black screen !!
two days ago I found one that when it's making like that if I go to the bios by F10 than press F9 for default config it ok and today it's coming back again but if I make default cong the bios nothing happen the problem still!!!
than I extract it than I rename the second file name 3603F21.fd to 3603.bin
than I copy the file in my usb after that connect the usb to the computer
on the computer while pressing win key + B and after a while beeping the computer stop and I restart ( astala vist!!!!!!!) all ok
It could be a simple as a CMOS battery gone bad. If your system date is set in the past that probably confirms that the battery is bad. The bad news is the CMOS battery might be difficult to replace in a laptop. They often require disassembley of the case.