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Try a different HDMI cable first into all ports. Try every HDMI cable you have. Then try a different component into TV HDMI ports. If you are using the receiver to switch inputs, try running HDMI cable straight into TV. HDMI is very finicky. Some cables won't work or stop working for no apparent reason.
When 1 HDMI port is broken most of the time all the ports are defect. This is because all the 3 HDMI ports are connected to 1 multiplexer IC. Only when the connector or the copper connection on the board is damaged the other two ports still be functional.
You still can use the other connections ( not HDMI) the should be working.
That's highly unlikely!!! More likely is that the cable is having problems or that someone mistakenly changed the picture i the TV from HDMI to regular reception. If the HDMI ports are changed to regular TV reception they don't see the HDMI ports only the regular video ports!
I have a Sony Bravia model KDL-46s5100 that had the same problem. All HDMI ports stopped working. I don't know why this works but unplug the TV for about 30 sec, then plug it back in and hold down the power button on the tv for 10 seconds. Like I said I don't know why this works but it worked for me. Good luck.
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