@squanchfu it’s getting up there in age and may show signs of some corrosion, failing caps or degradation of the solder connections. I suggest you start with a new pair of AV cables and try that. If that will not work, time to open it up and have a good look around to see if there is any obvious damage. After that I’d consider a total recap of the PCB. If you have to open it up post some good pictures of the mother board etc., with your QUESTION so that we can see what you see. [guide|21499] [guide|21505]