22 Inch SONY LED TV NO Picture Panel voltage Missing Problem Repairing

How to troubleshoot TV picture and screen issues Ever had your TV showing nothing but a black screen even if the audio was working? Unfortunately, that’s a common issue with low/middle-end LCD/LED TVs these days… Even more frustrating, this issue often comes from a rather tiny and cheap component that can be easily replaced. Most common issues are: Defective capacitor on the power supply board Defective LED in the backlight system In this post, we’ll take a look at the latter and at one way to fix it. One of my relatives had this exact symptom happening all of a sudden. This problem on low-end TVs often occurs within the first couple years. As the repair costs for that kind of TV is pretty low, considering repairing it yourself might be a good idea! Diagnosis The first step into repair is to find the root cause of the issue. As backlight failure is a very common issue, this is the first thing to test. To do so, the easiest way is to power on your screen, put a flashlight very close to it and check if you can see the image through. The image would be very dark, like turning the brightness of the screen very very low. Now that we now the image itself is fine, this means the main board is probably fine too, so we are going to test the backlight system itself.