Here's the solution for Nokia 6720 classic with a not working backlight LED problem and shows a dark or black screen display.
If encountered and try to fix this problem, you may first check the LCD backlight LED's or try to replace and install a new LCD screen module replacement, just to determine if the backlight LED's still working or not and its already been busted out.
If somehow after ensuring that the LCD backlight LED's were okay, you may then proceed to check some components and trace its connection line paths on the PCB board. This solution below shows where to easily find it.
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From the LCD pin connector, trace its corresponding line paths from where the backlight LED's supply voltage being connected. Check the battery supply voltage (VBAT) to the spot shown on the above solution.
Check and replace the components if found damaged were it runs through.
These components were composed of filter coils chip diode and capacitors.
If encountered and try to fix this problem, you may first check the LCD backlight LED's or try to replace and install a new LCD screen module replacement, just to determine if the backlight LED's still working or not and its already been busted out.
If somehow after ensuring that the LCD backlight LED's were okay, you may then proceed to check some components and trace its connection line paths on the PCB board. This solution below shows where to easily find it.
Nokia 6720c LCD Screen DSiplay Backlight Problem Repair Solution
From the LCD pin connector, trace its corresponding line paths from where the backlight LED's supply voltage being connected. Check the battery supply voltage (VBAT) to the spot shown on the above solution.
Check and replace the components if found damaged were it runs through.
These components were composed of filter coils chip diode and capacitors.
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