How to fix a notebook that freezes when plugged to AC power?
I have a Toshiba Satellite L300 which is 3 years old by now.
2 months ago it started to freeze or restart after some minutes connected to AC power, in battery it works nice, and it's able to recharge the battery when turned off. I took a long to identify that it was the AC power because it used to work for some minutes before shuts down. As the days go by the problem got worst and now it hangs at the same moment when I connect the energy.
I've read a lot about this problem and tried different solutions.
Tried another cable, cleaned the fan, monitored processor temperature, I've disabled one of the processors using BIOS, changed processors frequency to "always low" in BIOS, changed memory cards, removed the battery, pressed the on/off button for 30 seconds, removed hard disk and tried to use a live CD, I also have tried to configure laptop-tools (a linux tool to manage energy) but I don't know if I did it right, I was trying to set (in linux) the notebook to behave the same way in terms of energy with battery and AC power.
My readings indicates that's a common TOSHIBA problem and it's hardware. I send to 3 technicals assistance and they were unable to solve the problem. One of them told he changed the "BGA" chip (i don't know what it is), he said it worked for some time but later the problem appeared again (I don't believe it).
Some people say they can use it in Windows safe mode, but I don't have Windows installed. I'm running Ubuntu Linux and I definitely think it's not an OS problem since I tested with other OSs including Windows, actually I tried to install Windows but I was unable to finish since the battery autonomy is not enough (<1h) and in AC power it freezes anyway.
If anyone knows how to do it, tell me please. My battery now just hold 30 minutes and my notebook is almost useless by now.