I am working on an HP Pavilion a640n and it has a problem I have seen before but never been able to solve. When you click restart computer the PC logs off, then shuts down. At this point the problem starts. Instead of rebooting the pc just stays powered up. The Monitor light flashes yellow on the power button (indicating that there is no signal). What I have done:
1. Tried new monitor - no luck
2. Updated BIOS and video drivers - no luck
3. Googled and did all relevant ideas (disabled NVIDIA services and check power settings)
4. Can not enable or disable APM/NT - not available.
If I click on shutdown and then restart by pushing the power button, it works just fine.
Any thoughts would be appreciated