I have a bizzarre problem with my PC not booting properly. The symptoms don't make any sense...
The PC is a Mesh (UK) and about 18 months old. When I am away from home for more than two days and the machine has been powered down the following happens:
When I boot up the PC appears to boot normally, reaching the Vista Desktop screen. After a few moments the cursor freezes and the keyboard fails to respond. At this point, when I do a hard reboot the PC starts up but never reaches the POST stage. The screen indicates it is in "power save" mode and then goes blank. I then do numerous hard reboots (a dozen or more) until it finally reaches the POST stage and loads Windows normally. Provided I power up the machine once a day everything is fine. Until, however, it remains powered down for a few days, when I have to repeat this process.
I've checked the fans, and I've tried booting up without the modem so that no piled up software updates are causing it. I've cleaned the inside of the PC and everything appears to be connected properly. The monitor is fine.There appear to be no hardware or driver problems according to software I've got on the PC that looks for these things.
What is weird about this problem is the way it is linked to the PC being off for more than a day or so. What could this mean? If it is in regular daily use it is fine and boots normally. I would be very grateful if someone could throw some light on this.