I have 2 Dell U2312HM that won't turn on anymore. Both are completely unresponsive. The power went out a few months ago and took 1 monitor out, yesterday the power went out again and took the other out.
I have taken 1 monitor apart and replaced some components on the signal board:
When I supply external DC power supply 5V to I301, I get a constant 3.3V out. When I check the 5V pin of the Power Board when the Signal Board is disconnected I also get 5V. However with both of the signal board and power board connected through the wire cables I see a fluctuation in the 5V up and down to about 1V.
I am not really sure where to go from here since I don't know much about power electronics. Does anyone have a schematic for the power board L0281-2M? I have taken a look at some other posts but I haven't been able to find anything to proceed further.
I have taken 1 monitor apart and replaced some components on the signal board:
- I301 (5V to 3.3V regulator but had 0V out)
- all the electrolytic caps on the Signal board.
When I supply external DC power supply 5V to I301, I get a constant 3.3V out. When I check the 5V pin of the Power Board when the Signal Board is disconnected I also get 5V. However with both of the signal board and power board connected through the wire cables I see a fluctuation in the 5V up and down to about 1V.
I am not really sure where to go from here since I don't know much about power electronics. Does anyone have a schematic for the power board L0281-2M? I have taken a look at some other posts but I haven't been able to find anything to proceed further.
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