Cell phone is not powering on
The cell phone is not responding when the power button is pressed.
Dead Battery
Charge the battery and try to turn on the phone again. If the battery is already charged, took the battery out and reinsert it. If the cell phone is still not responding, the battery should be replaced.
Broken Screen
If the battery is good, a damaged screen is most likely to be the problem. Replace the screen and try to turn it on again.
Bad Logic board
If none of the above worked, the logic board may be broken...
No respond for button input
The cell phone is not responding when user press a button
Broken Keyboard
Press on a few different buttons. If other buttons work, then the keyboard should be replaced
Software deadlock
Turn off the cell phone and turn it on again, and see if the problem is fixed after restart.
Bad logic board
If none of the above worked, the logic board may be broken...
No sound coming out
Can not hear anything from the cell phone
Bad speaker
Plug in the ear buds to check. The speaker is probably broken if there is sound from ear buds, and the speaker need to be replaced.
Bad solder contact
Unplug the ear buds to check. If the sound is coming out from the speak, check if the ear buds are good. If the ear buds are good, then the solder contact is most likely need to be replaced.
Bad driver / virus
If no sound coming out from ear buds, try to remove and reinstall the sound driver.
Other people can not hear me
When making calls, other people could not hear what you say.
Bad solder contact
Unplug the ear buds to check if f the problem is fixed. Check if the ear phone speaker is broken. If the ear phone speaker is good; then the solder contact need to be replaced.
Bad mic phone
Plug in a good microphone and check if the problem is fixed. If the problem is fixed then the microphone is broken and need to be replaced
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