after removed the steel mid plate, does anybody measure the battery voltage? I measured the battery voltage is only 0.3V. is it normal? I de-soldered the battery three points and measured the battery voltage 3.8V. So It looks like battery is OK. The logic board has problem. So I connected external power source 3.7V and maximum current 50mA to the battery B+ and B-. I found the power source dropped to only 1.65V and 50mA. Could I say logic board has problem?