You can first try to see if the external HDMI display is normal? If it is normal, it should be that the output LCD panel line on the motherboard is NG....

I have some personal opinions and discussions about MEC PASSWORD CLEAR By Pass.
Scenario 1:
Assume that the foundry is burning to MEC. If the wrong version is burned during the process, if an error is found on the SMD production line during startup, it will be a huge undertaking to clean it up according to the method (moving resistors, soldering wires, and burning).
Therefore, it is unlikely to use this method to burn MEC on the production line (if the motherboard needs to be replaced according to the Nnotebook service and repair station, assuming that the factory production...

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