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HTC Desire 700 Dual Sim Troubleshooting
Released January 2014 by the HTC Corporation
Device will not power on
The phone does not turn on or respond when power button is pressed
Plug the charging cable into the device, and then plug the charging cable into a working electrical outlet. If the indicator light at the top of the phone illuminates when plugged in, press the power button. If the phone powers on, the battery is likely the problem and must be replaced.
Faulty charging port
If the battery and charging cable are both functional and the phone still does not power on when plugged in, the charging port of the phone may be faulty and can be replaced with a new charging port PCB board as shown.
If it is determined that the software of the phone is at fault in the issue, the motherboard may be replaced by following this guide.
Note that the most common cause of overheating in smartphones is being kept in cramped conditions. Ensure that the phone is open to the air while charging or after active use. The battery will stop charging as a safety precaution if kept charging in cramped conditions, so be sure that this is not the case before replacing parts
If the phone is overheating, check to see if the heat source is coming from the battery. If the battery is a factory installed Li-Po 2100 mAh battery and is overheating, it is likely faulty and can be replaced.
If the battery is still the source of overheating, ensure that the battery is a factory grade Li-Po 2100 mAh battery. If it is the proper battery type, but is distributed by a third-party source, it may very well likely be the problem. Third-party batteries can dangerously overheat, resulting in a complete loss of the phone and should be replaced immediately with a sufficient Li-Po 2100 mAh battery.
If the bottom receiver speaker is no longer functional, it must be replaced.
Replacement of bottom, front facing speaker
If the speaker located on the front of the device is inoperable, it may be replaced by following procedures shown in this guide.
Either camera can easily be damaged as they are quite fragile. If this happens, they can both be replaced.
Front facing camera replacement
If the front facing camera located on the front of the phone has broken, it may be replaced by following this guide.
Rear facing camera replacement
If the rear facing camera located on the back of the phone has broken, it may be replaced by following this guide.
Other hardware issues and repair
Miscellaneous repair issues for the device.
Damaged rear panel replacement
First, remove the back cover of the phone with your fingers. Next, remove the 8 torque screws securing the rear panel to remove and replace it as shown.