My daughter's D610 slowly died during a 10 week car holiday trip in Northen Australia. From the description of how it gradually happened I assumed it could be bad power connection and eventually the battery failed.

Completely dismantled very carefully and tested the power connector, whilst not perfect I believe the solder joints were acceptable.

When power supplies PA10 or PA12 plugged in directly to the laptop no lights of any kind, with or without battery. Checked with other battery too, same result. The power supplies do deliver right voltage and good under load.

Have a docking station and partly to my surprise with the 95W or PA10 power supply the D610 works fine. With the PA12 or 65W power supply the docking station refuses to work telling you to shut down and replace the power supply.

Ran into a problem when I tried to test with the car power converter, which delievered enough power but was not recognised so docking station again refused. The second D610 I later had to hand allowed the car power to be used but under "protest", warning that performance might be poor. Eventually I got the PA10 which was accepted.

I have a second D610 which works fine on all 3 power supplies. Now having option for swopping parts, I would like to know what I can try to figure out what is causing the power interruption?