Hi there,
I have an LG W2234S screen that doesn't work. When plugged in it does not power on when the power button is pressed. No power LED, no display - nothing.
I have replaced all the caps on the board with Panasonic FM series parts (apart from the small cap which was a generic equivalent model of the correct capacitance) with the exception of the large one which remains the original.
I have tested the power to the logic card from the power board and it appears to be correct. The two voltage regulators on the logic board also appear to be within spec at 1.8V and 3.3V. There is also a voltage drop across the power switch as I would expect but obviously the screen isn't powering up.
I have also noticed that the large cap on the board takes a long time to discharge, ie a couple of days to drop from the measured 320V - i'm having to manually discharge it prior to working on the board.
Thanks for your advice as to the next troubleshooting stages.
(Picture of the power board after recap).
I have an LG W2234S screen that doesn't work. When plugged in it does not power on when the power button is pressed. No power LED, no display - nothing.
I have replaced all the caps on the board with Panasonic FM series parts (apart from the small cap which was a generic equivalent model of the correct capacitance) with the exception of the large one which remains the original.
I have tested the power to the logic card from the power board and it appears to be correct. The two voltage regulators on the logic board also appear to be within spec at 1.8V and 3.3V. There is also a voltage drop across the power switch as I would expect but obviously the screen isn't powering up.
I have also noticed that the large cap on the board takes a long time to discharge, ie a couple of days to drop from the measured 320V - i'm having to manually discharge it prior to working on the board.
Thanks for your advice as to the next troubleshooting stages.
(Picture of the power board after recap).
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