To fix the OPPO F9 black screen light problem, you need to replace the OPPO F9 screen with a new one to easily determine the problem whether the screen LED is still working or has been damaged. You can also test the LEDs with a multimeter if you are confident in your workmanship and are sure not to damage the monitor's connection. If the newly replaced screen still does not display and the light does not light up, refer to the article below to determine the OPPO F9 screen light loss problem.
When the LED is affected, chances are the screen will go black, which means you won't be able to see anything! Display light problems are very common not only with OPPO F9 but any other OPPO phones in the market. They can be caused by software bugs or hardware problems. Try to find the cause so it can be easier to come up with a solution and fix the problem.
Tutorial
- Check the LCD for possible damage, cracks or breaks.
- Check your device's software and perform an update or install it.
- Check the monitor connection for possible damage. Clean, re-solder or replace if necessary.
- If the above procedures do not fix the problem, the error may be with the IC on main.
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Good luck!
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