tv screen blinks like a strobe light.

lindseyhurst150                      common issue that could cause that is a failed LED backlight array. You will have to remove the back from your TV and take a good look at the power board to rule it out as an issue by measuring the voltage to the backlight. Post some pictures of your boards etc. with your question. That way we can see what you see. If it is the Backlight LED strips, you will have to disassemble the panel. Let us know your TV’s exact model number. iFixitでの質問に画像を追加する方法