Question Faulty HDMI ports on Sony XBR75X850E (2017 model LED)

Jul 5, 2019
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In the past few days the HDMI ports 2, 3 and 4 have slowly appeared to die on my Sony XBR75X850E (2017 model 75" LED) It started with port 2, which failed to see the signal from my PC. I then tried running another device through the port and got signal, but the picture turned on and off and sound was distorted. The next day HDMI 3 stopped working as well, and I am now only able to get a consistent signal through HDMI 1. I've tried several devices through each port, using different cables with each.

I tried powering off the TV and kept it unplugged for five minutes -- did not help.

Do you think the main board needs to be replaced? This is no longer under warranty, so I'd likely be doing it myself.

Thanks
 

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