HUAWEI TECHNOLOGIES CO., LTD.
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4.4.2 Troubleshooting Back Light Faults
The problem of no backlight was related to soldering, LCD and CN702. Exhaust each possibility to
solve the problem.
4.4.3 Maintenance Instances
LCD had no backlight. When the phone is power-on, measurements the LCM_LED+ found no
voltage, we judgment is the MT6253 problem. Re-soldering removed the problem.
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