I have an XP Pro PC with SP3. I have all the latest drivers. And everything in Bios and windows itself is setup correctly. ACPI is in S3 mode.
When I want to shutdown the PC, I press the Sleep key, which I have done for ages, and the PC enters Sleep (Standby) mode. There are no lights on the PC, and it looks as if it is actually switched off, which is correct.
To restore the PC from Sleep, I have always pressed the Power button, and within a very short time, the PC is back where I left off previously. Again, correct.
But now, when I press the Power button, the PC seems to go through the exit Sleep process. The PC Power light comes on, the Monitor light come on. The first thing I see on the Monitor is the standard LG message about the video card. That disappears and small message then appears about the monitor being in Standby mode. The screen then goes black and nothing else happens.
To get the PC to work I have to reset it.
This started about a week ago, completely out of the blue. I haven't installed anything new. I have run SFC /SCANNOW but that didn't help.
Does anyone have a clue as to why this is happening?