dear sirs,
please excuse my English if any mistakes, I'm coming from France. I have a faulty Viewsonic VX2255WMB display that I would like to fix. I have disassembled it and found the DAC 19M011 that seems to be the culprit. I first changed the CapXcon C204, CE101/102103/104/105 capacitors. No other capacitors seemed doomed. After this, I connected the board to wall plug, the ON/OFF led got blue and red, and had a bad smell on the left side of the green DELTA coil. I could not identify the source and some component(s) start chirping. I checked the transistors and fuse that seem ok.
It have bought from Aliexpress a replacement board that is completely faulty : when plugged, the ON/OFF led doesnot even light up!
I wonder if the large capacitor on entrance could be the culprit: after being connected to wall plug, I measured ~300V with voltmeter on the Aliexpress board and ~30V on the original board. Any other guesses or suggestions? Best regards,
Pierre
please excuse my English if any mistakes, I'm coming from France. I have a faulty Viewsonic VX2255WMB display that I would like to fix. I have disassembled it and found the DAC 19M011 that seems to be the culprit. I first changed the CapXcon C204, CE101/102103/104/105 capacitors. No other capacitors seemed doomed. After this, I connected the board to wall plug, the ON/OFF led got blue and red, and had a bad smell on the left side of the green DELTA coil. I could not identify the source and some component(s) start chirping. I checked the transistors and fuse that seem ok.
It have bought from Aliexpress a replacement board that is completely faulty : when plugged, the ON/OFF led doesnot even light up!
I wonder if the large capacitor on entrance could be the culprit: after being connected to wall plug, I measured ~300V with voltmeter on the Aliexpress board and ~30V on the original board. Any other guesses or suggestions? Best regards,
Pierre
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