I know it was a bad idea, but I was hoping it would work. Anyway, I've started an update. It didn't work. I restarted the update a half dozen times. I've tried older firmware. I've reformatted the SD card. I've redownloaded the zip file three times. ...
Yes, it's corrupt and will not operate normally in M mode. The firmware update program opens every single time a battery is put in, even with power off.
I purchased it off Ebay, but from my understanding, it was a US version of the camera. Now I can't even get it to do anything to try a different country update.