Chosen Solution
Hi, It seems as though there is a backlight problem. Here are some relevant pages from the service manual that may help you to find out where the problem is i.e. the backlights themselves, the PSU or perhaps the mainboard telling the PSU to turn the backlights off. no video / normal audio troubleshooting flowchart video error - no video normal audio tests. expected voltages on the power board Not sure what the voltage should be on pin 18 but this is the pin that the mainboard signals the PSU to either turn on or off the power to the backlights, so maybe you can check its’ value during the brief time that the backlights are on and then when they’re not to see if it changes or not.
Hi check ur inner led panel lights power as u can see the image inside with dark.
