Hello everyone. I've been reading the postings and have found them very informative. My brothers Vizio VW42L HDTV10A turns on with the power button, the light changes from amber to white but the back light doesn't come on and there is no sound or video that I know of. This set reminds me what a pain it is to troubleshoot without good prints of the circuit boards and their interconnections. I found and replaced one bulging cap (MC2) on the Master Inverter. This is what else I know so far.
Measurements
Power supply
CN2-1,2,3,4,5 24.5V
CN3-1,2,3,4,5 24.5V
CN5-1 3.12V
CN5-2,3,4 11.9V
CN5-10,11,12 5.2V
CN5-9 .247V
CN5-10 .011V
Main Board
J1-1 3.12V
J1-2,3,4,5 11.9V
J1-9,10,11 5.18V
J1-13 .011V
U8-1 5V
U8-2 3.3V
U1-5,6,7,8 5.14V
U1-1,3 5V
U1-2,4 0V
R20 (OPWRSB) 0V
U2-2 2.3V
U4 no component
U33-2 3.3V
U6-2 10.28V
U5-2 4.53V
I would appreciate any help I can get.
Thanks
Measurements
Power supply
CN2-1,2,3,4,5 24.5V
CN3-1,2,3,4,5 24.5V
CN5-1 3.12V
CN5-2,3,4 11.9V
CN5-10,11,12 5.2V
CN5-9 .247V
CN5-10 .011V
Main Board
J1-1 3.12V
J1-2,3,4,5 11.9V
J1-9,10,11 5.18V
J1-13 .011V
U8-1 5V
U8-2 3.3V
U1-5,6,7,8 5.14V
U1-1,3 5V
U1-2,4 0V
R20 (OPWRSB) 0V
U2-2 2.3V
U4 no component
U33-2 3.3V
U6-2 10.28V
U5-2 4.53V
I would appreciate any help I can get.
Thanks
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