PS5 HDMI Replaced but Still No Signal: MN864739 Failure
A real repair case showing how a visible HDMI-port problem can coexist with a deeper motherboard-level video fault.
Case summary
A PlayStation 5 arrived with a physically damaged HDMI port. The connector was replaced and the installation tested, but the console still produced no video. That result changed the job from a connector repair into a motherboard diagnosis.
The replacement port was not the end of the diagnosis
A successful physical HDMI-port replacement should restore the connector itself, but it cannot correct a separate electrical failure elsewhere in the video-output path. Because this console still had no display after the connector work, additional testing was required rather than assuming the new port was defective.
What further testing found
Board-level diagnostics identified the Panasonic MN864739 HDMI processing IC as electrically shorted. Testing also indicated that nearby motherboard components were affected. This established that the no-video condition extended beyond the physical HDMI connector.
Why this case matters
This repair demonstrates why “PS5 no signal” and “broken HDMI port” are not interchangeable diagnoses. A console can have visible connector damage and a second motherboard-level video fault at the same time. Replacing the connector correctly may reveal that deeper fault rather than cause it.
Result
The console was classified as a motherboard-level no-fix rather than repeatedly replacing a connector that had already been installed and tested. The important diagnostic result was identifying that the remaining no-video condition was downstream of the physical port.
