MobilePro 900 Backup Battery Problem

Hi folks,

I picked up a very well-used MobilePro 900 yesterday, no power adapter, no manuals, no accessories. I was able to cobble together an adapter and thanks to this wonderful site I have all the documentation I need. I put in a 4GB flash card and run the upgrade from 2000 to CE 4.2, and ActiveSync is linking me to my XP desktop PC. The problem is I am still getting the warning about the backup battery being low. I have tried the patch for the back-up battery problem, and even replaced the backup battery, but I still get the warning every few minutes. It did the same thing before I upgraded to 4.2. I have repeatedly rerun the patch, but the error message keeps returning and the task bar still shows the problem icon.

Before I get to locating a wireless card for this thing I would like to resolve this issue. Any ideas?

There's probably a bad connection on the coin cell holder, this is a frequent issue with the 900 series. To properly fix it, you will have to pull it apart clean the contacts and trace it I'm afraid.

C:Amie is right on! If it did it before the upgrade, then it is a hardware problem...

Any online documentation on the teardown? I have successfully worked on a few laptops, but picture guides always make me feel safer. BTW, confirmed it is a hardware problem by pulling the main battery. Even with the backup battery in it does a hard reset. The backup battery isn't successfully powering anything.

Forget the request for a guide. I just found it on mymobilepro.net. I should have known you already had that covered.

Edited by evtinker 2009-08-03 7:25 AM

Look at the infamous Mr. Hawleys personal site, he has some pictorial disassembly guides for the 900x