I have an Insignia NS-L42Q-10A lcd that has no indication of power after being plugged in and the power button is pressed. No power LED or anything. Upon taking the back off the unit, I took a few measurements from the power board. I was getting no voltages on the rail, with the main board being plugged into the unit or not. No 5 volt stanby voltages either.
Fuse is good, check all the diodes and they are good as well. No burned/scorched components either. Caps are all Elite brand with the exception of the filter caps that are Rubycon. Checked the voltages on the big filter caps and both of them showed 5.90 volts on each of them while being plugged in. My thoughts are that I might have an issue with the SMPS controller IC, but I want to make sure that I am troubleshooting it the right way.
Board number is 715G3511-P02-000-003M and the pictures of the top and the bottom of the board are as follows:
Any thoughts, ideas on how to proceed would be more that welcome.
Fuse is good, check all the diodes and they are good as well. No burned/scorched components either. Caps are all Elite brand with the exception of the filter caps that are Rubycon. Checked the voltages on the big filter caps and both of them showed 5.90 volts on each of them while being plugged in. My thoughts are that I might have an issue with the SMPS controller IC, but I want to make sure that I am troubleshooting it the right way.
Board number is 715G3511-P02-000-003M and the pictures of the top and the bottom of the board are as follows:
Any thoughts, ideas on how to proceed would be more that welcome.
Comment