How to Repair Common Problem

I.Hang or can not power on
The main situations cause
1.check whether crystal broken
2.whether DSP weaker weding
3.DDR weaker weding
4.FW lost,need to upgrade again
5.Power IC broken
6.FLASH weaker weding or broken
7.Charge seat or USB Port weaker weding or broken
8.Charge IC Buring or broken

II.No Photo,but with Sound
1.Sensor IC weaker or broken
2.Sensor IC Cable Broken or loose
3.Sensor IC abnormal power supplied

III.LCD Black
1.LCD buring or broken
2.Cable of LCD,remake Cable correct location
3.IC of LCD problem

IV. Strip LCD
1.Sensor IC weaker weding or broken ,need to change the Sensor IC
2.Cable Broken or loose,need to remake cable correct location or change cable of LCD
3.LCD Problem,change LCD
4.DSP weaker weding or broken,need to make Tin again or change DSP

V.With Sound ,without Photos
1.Speaker problem ,need to change speaker
2.Audio IC problem,need to change audio IC
3.Earphone set problem,need to change earphone seat

VI.Can not charger
1.Charger IC Problem,change Charger IC
2.Battery Problem,need to change battery
3.Battery seat problem ,change the normal battery seat

VII.Can not read card
1.Card Seat Problem ,need to change Card Seat
2.Card Seat weaker weding,need to add Tin
3.Card Problem,need to change a Card
4.DSP weaker weding or broken,need to add tin or change DSP IC

VIII.USB connect fail
1.USB Cable problem,change USB Cable
2.USB Port weaker weding or broken,weding again or change USB Port
3.CPU Problem,change CPU

IX.HDMI Connect fail
1. HDMI Port problem,change HDMI Seat
2.weaker weding,weding again
3.DSP Problem,change DSP

X.No GPS Signal
1.GPS Model problem,need to change
2.GPS Cable break,check by eye,change cable

XI.IR light Problem
1.IR IC broken,change IR IC
2.IR light broken ,change the IC light
3.Cable Break,connect the cable

XII.Button not working
1.clean the keyboard
2.PCB Dirty,clean PCB
3.DSP broken,change DSP