I was given this Samsung LN40A550P3F tv. I was told it had multiple problems before it "died". Sometimes not responding to power. Getting vertical colored lines in picture. Sound going in and out. I opened it up and could see visible scorch marks on IC1203 on main board BN41-00975B. I haven't been able to locate the schematics yet for the power supply or main board. I disconnected the boards and connected the power and the power supply has a high pitched whine coming from it, so I disconnected it. It is model BN44-00197A. budm helped me resurrect another tv in this series which my daughter really appreciates! Following on that advice I have already replaced c102 on the main board.
I wasn't sure where to start with the power supply...is it ok to keep plugged in with that whine and still take readings? Can someone guide me on troubleshooting the power supply and identifying what parts needs replacing on the main board? As I previously stated I already replaced c102 on the main board. I've seen this link from shopjimmy, but can I purchase the components separately and for less? I've uploaded pictures of the two boards. I'm ready and willing to take my time testing and learning; provide additional photos/information as needed; and solder anything necessary. Thank you so much!
I wasn't sure where to start with the power supply...is it ok to keep plugged in with that whine and still take readings? Can someone guide me on troubleshooting the power supply and identifying what parts needs replacing on the main board? As I previously stated I already replaced c102 on the main board. I've seen this link from shopjimmy, but can I purchase the components separately and for less? I've uploaded pictures of the two boards. I'm ready and willing to take my time testing and learning; provide additional photos/information as needed; and solder anything necessary. Thank you so much!
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