What you'll notice
The picture flickers, drops to black, or shows "no signal" briefly and recovers — worse when the cable is touched.
Why it happens
A marginal cable, a partially failed port connector, or interference on a long unshielded run.
How we fix it
We swap in a known-good high-speed cable to isolate the fault, then repair the port or address the cable run as the evidence points.
Still not working?
If the checks above haven't restored your hdmi ports & connectors, this usually needs a technician. Our HDMI Port Repair service covers exactly this fault.