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However, I double-checked the power plug in the basement. QUITE hot and don't believe this is normal.
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If the transformer gets hotter than usual, it might be caused by a short in the coax. Do you know how to use a voltmeter and an ohmmeter?
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No "easy" way to test a bad tuner in the TV itself? It's a Bravia KDL 40S4100.
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Thanks for the model number.
manual
https://docs.sony.com/release/kdl40s4100.pdf
If you get the TV working, it has a Signal Diagnostics screen in the channel menu that will help with antenna testing.
Can you borrow a TV to test with your antenna?
If you have a old VCR, you can use it as a signal source when playing a tape to test the TV tuner. Most of them have a channel 3 or 4 output that can be connected to your Bravia tuner.
You can buy an external tuner like the Channel Master 7003 that has channel 3 or 4 output. If it shows that your tuner is bad, you can connect the tuner composite A/V, component, or HDMI output to the TV input.
https://www.channelmaster.com/Digita..._p/cm-7003.htm
http://www.solidsignal.com/pview.asp?p=cm-7003
http://www.avsforum.com/forum/186-co...erter-box.html