Newbie (2 Posts)
7/14/2009 2:20:58 PM
I've been having the same problem for a while. Power switch has become virtually useless. I can power on and off with the eject button. The system powers on by itself at random times, and only runs for a short period of time before shutting down. I checked continuity and operation of the power switch and it's OK. The problem seems to be temperature dependent, when the system warms up, it's run-time gets shorter.
My aero-gel cap also blew out. (Replacement part at Mouser.com Part no. 504-B0810-2R5105-R) It covered the board area around it with electrolyte. I removed the old cap and cleaned up the electrolyte as best as I could, but there is still a small trace left on the board. I didn't have a replacement cap so I just left it out until I get one. When I powered up the unit, everything worked fine. Power button worked great. Then about a week later everything went bad again. The power button stopped working and the system will not run for longer than 30 seconds.
The aero-gel cap provides backup power for the realtime clock. (Keeps the correct time for a few hours when you unplug the system.) I'm guessing that it has nothing to do with the power button, but something in the area must have been affected by the cleaning of the electrolyte to make it work again.
I know this isn't a solution, but it may steer someone in the right direction to get this problem solved. When I find the time, I want to pull the box apart for a better cleaning and check the components around the supercap.