No power, no standby light, no TV. Replaced both the power board and main board. Didn’t fix the problem. Tested the power cord, it works. Checked fuse on both old and new power board, both are good. What the heck….any idea’s
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Jeff Johnson ..No power, no standby light …. this only happens when the ac/dc adapter is gone or the power supply is gone. you replaced the power supply. what voltage are you getting from your ac/dc adapter? im assuming youve checked your wall outlet?
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sorry to say, but it is impossible for your set not to have power if those things check out. ill take you at your word.
that being the case, your power indicator light is fed off of your main board. no light may indicate this being the issue.
next step would be to take voltage readings on your power supply at the connector that leads to the main board. there should be a legend on the board that displays pin labels and required voltages. see what your readings are there.
if they dont match or are jumping around, unplug the main board and check again. if they return to normal, that is also another indication of the main board or something attached to the circuit.
if you require assistance with the voltages, post a pic of the boards legend.
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I replaced the power supply board. Got 123 AC volts from the plug. The power cord checked out ok as well.
da Jeff Johnson