Chosen Solution
Has anyone else seen this issue before? After 20-30minutes of turning on, the image on my tv seems to jump up the screen for a few seconds and then comes back down again constantly. It’s a Hisense 55p7 Ive turned it off and on again, left it unplugged for awhile and done a factory reset. If the TV’s left off for a few hours then the issue takes 20-30minutes to come back. If I restart the TV instead then I can still see it happening as it’s starting up. The jumping image, is across all inputs, tv, apps and different HDMI ports. Any advise on what needs replacing, repairing?
Update (10/21/2022) Ive pulled the back off and couldn’t see anything obviously wrong with the t-con board or the others boards.
Joshua Farnell since this happens after the TV has been on for a while it could be a capacitor issue as well as a transistor issue on the main board. Try to run your TV with the back off and a fan circulating air against the main board. The other thing you can try and do is use some electronic freeze spray and spray small parts of your main board while your TV is doing this. See if that corrects the error and post and image of the main board and mark the area that showed improvement. There is always the possibility (very minute) that this an issue with the actual panel. Without an oscilloscope and schematics, it would only be a guess and can only be verified by ruling out the main board.
