Lorimommy3 :
graemekeatley :
I realise this is an old topic however wanted to add some info for reference purposes. I had a customer bring their laptop in with same type of fault the issue on hers was she was using a universal power supply and the voltage was set to 18 instead of 19 switching to correct voltage resolved my issue
How do you change the voltage?
I believe graemekeatley was referring to a universal charger. The original one doesn't have a voltage regulator.
I want to share my personal experience. Replacing the charger didn't work for me (tried 2 different universal chargers)
Resetting the laptop (power button for 30s without battery or charger plugged) neither.
So I looked in the power jack (on the laptop) and saw a lot of oxidation and "dirt".
Also the jack itself internally, has a central pin, and around there is a tiny clip that makes contact with the exterior of the charger plug. I took a very thin screwdriver and tried to pull that clip as near to the center pin that I could.
By doing that I improved the electric comunication and solved my problem.
REMEMBER to REMOVE the battery before and press power button to release all residual eletricity.
Hope I help someone out.
Best of luck