SV420XVT1A All HDMI Bad

[jkomorek]

I am trying to repair a Visio SV420XVT1A for a friend. The TV stopped accepting HDMI on all 4 ports. The setup did not change when the TV stopped working and another TV works fine with same cables, so I am confident that it's the Visio TV.

I tried plugging an HDMI device into all 4 ports, all result in No Signal. Component inputs work fine though.

Should I just swap out the main board and expect that to fix the issue, or does anyone have better advice? I dabble in TV repair, but if the issue isn't power then I am quickly beyond my element.

[Glitcher]

Re: SV420XVT1A All HDMI Bad

It'll probably be best to swap the main board. Or try checking all the voltages regulator on the main board. Vizios are known for bad main boards and usually bad voltage regulators. Also check if any of the pins of the hdmi ports have broken. I had one instance where two hdmi ports on the main board didn't received any inputs. I was settled on replacing the main board until I saw that all the pins have been broken off due to cold joints and continuous deplugging of the hdmi cable. I resoldered the hdmi ports back on and it was working again.