maybe someone has an idea an can help...
The problem I got is that the A50 suddendly powers off! This happens with and without the power supply being connected.
Any ideas where I could start looking for the issue??
Overheating is definitely a possibility, but that doesn't necessarily mean the fan needs to be replaced. There might just be too much dust in the heatsink and fan for there to be enough airflow to cool your CPU.
There could be other explanations too. How long does it take, usually? Do you see a blue screen right before it shuts off? Any other clues?
I have an A70 with which I used to have the same problem, I blew out the fans with air (they were pretty much clean) then I went and made a riser for it, so the rubber pads would fit into grooves and lock into position (approx. 1-1/2" - 2" off the desk just for testing) and it worked fine. For almost a year now I have it sitting on a cooling pad and it works great.