This points to a board issue. I can't tell if the OS was loaded to the factory load.
HP 630 Core 2 Due laptop, 1 GB memory, Windows 7 OS. Almost 2 years old - narry a problem until now. Sequence of events:
With the wall socket not plugged, switching laptop on boots up to the point where Windows 7 logo shows and laptop hangs up. If connected to power, normal operation ensues. Have run troubleshooters, diagnostics, replaced memory, hard disk, battery - same result.
2. Will boot in safe mode on battery.
Please identify problem and recommend fix. Thanks