Apple MacBook Pro a1706 notebook screen dark “non common failing” maintenance

Apple MacBook Pro a1706 notebook screen dark “non common failing” maintenance

[machine model] Apple MacBook Pro a1706 notebook

[fault phenomenon] dark screen of notebook

[maintenance process]

Received an apple MacBook Pro a1706 fault machine, the customer described the notebook no booting, received the hand found that the screen is dark, ask the customer if there is water damage!Remove the machine, open the back cover, there is no water damage!The screen of this machine has a common failing, the FPC of the light bar likes to be disconnected. It happens that there is a replaced screen was broken.screen head in the hand. When you install it, you can booting up, and it is more certain that the problem is the screen. The screen is too expensive for the customer to accept. Open for repair!Results the screen head was removed and found that FPC was good.

Apple MacBook Pro a1706 notebook screen dark “non common failing” maintenance Figure 1

After removing the screen head, it was found that the 5V test point on the logic board was Short circuit.

Apple MacBook Pro a1706 notebook screen dark “non common failing” maintenance Figure 2

Here used stupid method, led boost chip and peripheral Capacitor are removed, found or Short circuit!Roast chicken. The culprit is found on the back of the logic version.

Apple MacBook Pro a1706 notebook screen dark “non common failing” maintenance Figure 3

Cut him out, 5V no Short circuit, put the original removed back, install the machine, the screen has been lit up!This is the end of troubleshooting.

Apple MacBook Pro a1706 notebook screen dark “non common failing” maintenance Figure 4