Okay, so please bare with me while I go through all of these details.
I have an Acer 4520 that was given to me because it was unreliable. It is periodically having issues where it will not show anything on the display. When I received the laptop, it had XP Pro x86 installed. Immediately upon receiving it, hoping it would be a software issue, I nuked it and put Windows 7 Pro x64 on it.
The issues appear to only be when the system goes into hibernate or standby mode. I think every time the system has been fully shut down the display has come back. This happens on both AC (with and without battery connected) and battery power.
Here is what happens. When the unit is in either hibernate or standby and you turn it on, the green power light comes on and you hear the fans momentarily run as it is waking up. However, no display comes on so it sits there with the green light still lit. No fans running or anything except for the first moment. I have found a common fix to be to unplug the power and let the battery completely drain while in this mode. When I come back with the dead battery, plug the unit in, and power it on I usually get a display and it resumes from the saved session.
So this leaves me at, what the heck? I contacted someone who repairs these and they blamed it on poor heat circulation (GPU overheating). However, this doesn't make sense because it doesn't happen a) while the device is on or b) it will occur hours after the devices last use.
Oh yeah, and when there is no display, if I hook up an external monitor there is no signal there either.
Suggestions welcome. Thanks,