PLEASEEEEEEE HELP T-MOBILE MDA III (QTEK 9090)

[MpegTv]

Hi Guys,
I put my T-Mobile MDA III (same as qtek 9090) on a cradle and after 10 minutes the screen turned off and the red light appeared on a top right corner. Now the device couldn't be turned on again. It looks like a completely dead device. Could you please help me what to do?
Is that a software failure or some other problem?
Please please please give me a hint. Is there any schematics that will help me in repairing the device? What is a cause for that failure?
Thanks in advance,
...MpegTv....

[indra9110]

try to hard reset by pressing power and soft reset button

[MpegTv]

I've tried with hard reset and also with placing the device into bootloader menu with camera+record+power+reset and still nothing happened.
It is completely dead !!!

[dogger26]

we have had this problem a few times with our blue angels at work, bad connection with the cradle seems to suck your batterie dead, we swapped batteries and pda works again everytime, This is the problem we get monthly that leads to dead looking pda's, exept that a batterie swap allways works,
ps
the batterie we swap with works too its just been drained.

[MpegTv]

Hi guys,
I discovered the cause. Something's wrong with my battery. After few minutes on a cradle the device turned ON and then reported BackUp battery VERY LOW, please recharge or replace.
What is a backup battery? Is that a main battery foor some other battery inside of device? How can I replace that backup battery.
When the device is on a cradle the backup battery is on 25% and the main battery is 0%.
What do i have to do beside charging?

Regards,
......MpegTv.....