Chosen Solution
Hi All! I have a Samsung LN37A550P3F and as of recently, it has been having a hard time powering on. It goes through multiple power cycles with an odd looking pixelated screen between power cycles before it turns on successfully. It sometimes has loud screeching sounds coming out of the speaker too. I have attached a video of the power up here. Any advice on what part I may need to order and replace would be helpful! Thanks! Zane
Zane Williamson this could be a main board issue. Sometimes bad capacitors and/or bad power IC’s can be the cause of this. You’d have to remove the back of the set and take a look at all the boards for obvious damage. Post some images of all of them with your question so we can see what you see. Use this guide Adding images to an existing question for that. Of course, check all other inputs as well before taking it apart. Update (03/18/2018) Check the marked area for us. It looks like just some dust but just wanting to make sure. Nothing obvious at this time noted like you already mentioned. You are missing one board. The T-con board is not shown. Follow the wire going from CN1101 on the main board, it will terminate on the t-con board. Do you have a multimeter with which you can measure some voltages from the power board to the main board and possible from the main board to the t-con board?
