If your HDMI port on the PS4 is not working, try the following steps:
Check Cables: Ensure that your HDMI cable is undamaged and securely connected to both the PS4 and the TV or monitor.
Try Another HDMI Port: If available, try using a different HDMI port on your TV or monitor to rule out a faulty port.
Use a Different Cable: If possible, try a different HDMI cable to eliminate the possibility of a faulty cable.
Restart Devices: Power off both the PS4 and the TV or monitor, unplug them for a few minutes, and then restart. This can sometimes resolve HDMI handshake issues.
Safe Mode: Boot the PS4 into Safe Mode by holding down the power button until you hear a second beep. Choose the “Change Resolution” option, and follow the on-screen instructions.
Update Firmware: Ensure that both your PS4 and TV have the latest firmware updates installed.
Check TV/ Monitor Settings: Verify that the TV or monitor is set to the correct HDMI input. Some devices have multiple HDMI ports, so make sure you’ve selected the correct one.
Test on Another Display: Connect your PS4 to a different TV or monitor to see if the issue persists. This helps determine if the problem is with the console or the display device.
Reset Video Output Settings: If you’ve changed TVs or monitors, hold down the power button until you hear a second beep to reset video output settings.
If the issue persists after trying these steps, there may be a hardware problem with the HDMI port on your PS4, and you may need to contact Sony support or consider professional repair services.