[Q] Defy reboots after plugging in usb

---

I recently flashed my Defy with 3.4.2-179-2 CEE DEBLUR and it reboots every time I plug in my usb cable. It doesn't matter if it's connected to a PC or to the power adapter. Anyone have the same issue and know of a solution?

I did a google search and found someone complaining of the same issue but didn't see a solution.

More background:
I had an issue with my phone and when I went to do a factory reset I was stuck on the google screen. My power ended up running low to the point where I couldn't run the bootloader. I had to charge the battery manually with a battery charger and some wires. I monitored the voltage throughout to make sure the battery was ok. After flashing the new SBF I found that things worked fine except whenever I plugged in a USB cable it would reset. I put CM7 on the phone hoping it'd help but the problem still lingers.

I will probably attempt to flash another SBF or maybe reflash the existing one.

Does this problem only exists if the phone is fully booted or does it happen if you plug it in while booting also? Because if its happening while booting too maybe your usb cable is broken and theres a short in the cable that makes the defy reboot. Have you tried another cable? And what about plugging the cable in before booting the phone? Tried this already?

I encountered this problem occasionally before. Dunno why.

There's 3 possible issues here apart from software/firmware causes.

1) The USB cable might shorted.
- This can be confirmed by using multimeter to test the usb cable. You will see a shorting between to wire in the USB cable.

2) The Phone USB port might shorted.
- This can be confirmed by using another good/new usb cable and test it with multimeter.

3) Phone battery broken(happened when you charge it using wire and external charger).
- This can be confirmed by trying another Defy battery and charge it.

hi farsight,

upon further inspection i'm pretty sure the usb port is shorted because if i squeeze the bottom of the case the phone will reboot.

is there any way i could fix this? I've looked at some videos for the disassembly of the defy.


hi iregistry,

yes the issue occurs if the phone is fully booted and when it's booting.

quit risky la.. if under warranty, why not claim/RMA?

hi adie, i bought it new on ebay and i'm not sure how the warranty works on that.


[solved!]

after further testing I believe it was because the battery contacts were not as close together as they were originally due to me manually charging the battery. It must have been right on the very edge because it would work normally but just squeezing it would make it lose connection.

I used a pin to push the contacts closer together and hope this solves the issue. I've plugged in the usb and squeezed the case and so far everything seems ok.

IMO this is a poor design on motorola's part. the raised contacts on the phone are nice but the contacts on the battery are poor.

Thank you everyone for responding.

Had the same issue. Your solution worked on mine as well. Pushed the contacts on + and - in, and it worked! Thank you!