Recently I was given two broken Samsung monitors; a 204b and a 225bw. I'll talk about the 225bw in this thread.
The 204b shares the same power/inverter board with the 225bw. The 225bw had 4 obviously bad caps. The 204b had no obvious cap problems. I do not have a cap tester, and since I was already ordering parts for the 225bw I went ahead and re-capped the 204b as well. I replaced C110 and C111 with 820uF 25V United Chemi-con LXY caps (digikey pn 565-1800-ND). I also replaced C112, C304, and C305 with 330uF 25V Panasonic FM caps (digikey pn P12386-ND).
After the recap the monitor turns on, the backlights power on, but the screen is partially messed up. The top 1/3 of the screen is normal. But the bottom 2/3s of the screen is scrambled and useless. It does not matter which video input is used, even with no video input the "no input" screen is messed up on the bottom. I suspect the video board is the problem, but I don't see anything obviously wrong on the video board. Any suggestions?
Attached to this post are close-ups of the front and back of both the power/inverter and video boards. I just realized I forgot to take a picture of the screen while the monitor is on. I'll try and get that picture posted soon.
The 204b shares the same power/inverter board with the 225bw. The 225bw had 4 obviously bad caps. The 204b had no obvious cap problems. I do not have a cap tester, and since I was already ordering parts for the 225bw I went ahead and re-capped the 204b as well. I replaced C110 and C111 with 820uF 25V United Chemi-con LXY caps (digikey pn 565-1800-ND). I also replaced C112, C304, and C305 with 330uF 25V Panasonic FM caps (digikey pn P12386-ND).
After the recap the monitor turns on, the backlights power on, but the screen is partially messed up. The top 1/3 of the screen is normal. But the bottom 2/3s of the screen is scrambled and useless. It does not matter which video input is used, even with no video input the "no input" screen is messed up on the bottom. I suspect the video board is the problem, but I don't see anything obviously wrong on the video board. Any suggestions?
Attached to this post are close-ups of the front and back of both the power/inverter and video boards. I just realized I forgot to take a picture of the screen while the monitor is on. I'll try and get that picture posted soon.
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