I am having a problem that is driving me nuts! I have an HP Presario x1460CA laptop about three years old. Occasionally it will not wake up from sleep or standby mode. The computer works as I can connect it to an external monitor to see the screen. The screen is black and the back light works as when I press the button that turns off the screen when you close the lid, the screen gets darker. I have upgraded the BIOS and XP is upgraded to SP2. SP is Home Edition V2002 SP2 Processor is an Intel Pentium(R) M at 1500 MHz 598 MHz, 512 MB RAM Eventually it will come on after a hard boot. I have had several technicians look at it and they can't seem to find anything amiss. Any suggestions would be greatly appriciated.