Hi All!
I've recently been trying to get into TV repair (mainly for the fun of it/side hobby), and to better my lack of component level repairs. I work IT and am contently given broken electronics, usually which I try to fix for fun. In the past, I've thrown parts at the TV based until It works. Usually I'd sell it at a major loss after that, as a man can only have so many TVs.
I saved a Insignia NS-p502Q-10A from the curb earlier this week, and think I've diagnosed it down to a short to ground on the input board. I checked all the outputs on the power supply, and verified that both the X and Y mains are receiving the proper power, as well as the suspect input board. I also ran a continuity test across the buffers, which came back negative.
On the input board, I don't receive the noise if I unplug the main connector to the control board. Additionally, the main IC after 30 seconds or so gets extremely hot, to the point where I can barely keep my finger on it.
Here is a video of the noise:
https://drive.google.com/open?id=1ZD...PuSVLnc6hWLJ3X
Advice on what to check next is much appreciated!
I've recently been trying to get into TV repair (mainly for the fun of it/side hobby), and to better my lack of component level repairs. I work IT and am contently given broken electronics, usually which I try to fix for fun. In the past, I've thrown parts at the TV based until It works. Usually I'd sell it at a major loss after that, as a man can only have so many TVs.
I saved a Insignia NS-p502Q-10A from the curb earlier this week, and think I've diagnosed it down to a short to ground on the input board. I checked all the outputs on the power supply, and verified that both the X and Y mains are receiving the proper power, as well as the suspect input board. I also ran a continuity test across the buffers, which came back negative.
On the input board, I don't receive the noise if I unplug the main connector to the control board. Additionally, the main IC after 30 seconds or so gets extremely hot, to the point where I can barely keep my finger on it.
Here is a video of the noise:
https://drive.google.com/open?id=1ZD...PuSVLnc6hWLJ3X
Advice on what to check next is much appreciated!
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