I have a 53FDX20B, the remote turns on the little red indicator light but I have no picture and no sound. I pulled the power supply card and both fuses on the card are OK. Any ideas on repair or troubleshooting steps I can take to narrow in on the problem? I have digital and analog multimeters but no scope or high voltage probes
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Re: no picture, no sound
First thing to check, would be that there is no oily liquid or residue around or on the printed circuit boards underneath where the picture tubes are. If there is, one or more of the tubes are leaking out the coolant and the seals will need to be repaired as well as the board, if it is not beyond repair. If that does not work, check out the power supply voltage . Check to see if the horizontal output transistor is shorted, or that the convergence Ic's are not causing the set not to start up. Good Luck
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The red light on the front is part of the system control (computer) in your television it indicates likely your power supply and computer are functioning. There are a multitude of problems that can cause no picture and no sound. Power supply troubles are most likely. The system control will have it's own little power supply which is always on so it can listen to the front panel or your remote. It will continue to operate when the heavy duty power supply might not. This suggests a shop repair would be in order. House calls can't fix something like this unless they are VERY lucky and find something obvious. You will still pay for the house call even if they can't fix it.
It is possible one of the internal fuses blew out. It could be a bad horizontal outut transistor. It could be a bad secondary of the power supply went bad And many other things. If it's just a fuse, it won't cost much, but a lot of them do not look like you would expect a fuse to look like.It might be a little yellow, green, or gray rectangualar box shaped part. :D