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iPhone 7 black screen without reaction repair
Machine model: iPhone 7
Malfunction: mobile phone screen is black or frozen doesn’t respond
Maintenance process: Connect the power supply source meter,current change is normal, mobile phone screen is black or frozen doesn’t respond, first change the screen to eliminate Accessories problem, and then we will see if BTB connector diode value is normal on the motherboard.
iPhone 7 black screen without reaction repair Figure 1.
iPhone 7 black screen without reaction repair Figure 2.
diode value is OverLoad when 29 pin LCM _ to _ chestnut _ PWR _ en _ conn shows that VCC is on.
iPhone 7 black screen without reaction repair Figure 3.
Find the problem, go directly to Jump wire.
iPhone 7 black screen without reaction repair Figure 4.
iPhone 7 black screen without reaction repair Figure 5.
It was normal when the flying line was tested by diode value, and then the screen switch showed that it was normal, and the maintenance was over.
iPhone 7 black screen without reaction repair Figure 6.
iPhone 7 black screen without reaction repair Figure 7.
