|This thing is driving me nuts...|
When my laptop is running on battery, everything seems ok. When I connect the external power supply, the screen gets garbled and freezes. But if I am in safe mode, this does not happen.
I have tried restore points, updating Vista, running various diagnostics, and everything indicates system ok.
I openend up the laptop completely, cleaned all the boards, fan etc, still no love.
Voltage on power supply is 19.3 or so (spec is 19v), so I think no problem there. I am not sure if there are spikes in the power supply unit or if there is ripple voltage. Besides, isn't it supposed to be a switching mode PSU...
THis has been a progressive failure. Initially (several months back), the laptop screen would get garbled (and system freeze) after about an average of 45 minutes of operation in normal mode (not safe mode). Then this time reduced gradually over 2 months to almost instantaneous freezing when main supply is connected. Have tried using external monitor, still the same issue.
The only way I can now use the external power supply is when running in safe mode.
Somebody, please help me (on my knees now).