HDMI The HDMI input becomes disabled all by itself. Apparantly there is a sensor that senses that the back has been removed from the set. There is a proceedure to re-enable it but it requires me to remove the back of the tv, connect a jumper, plug in the power, unplug the power then put the back on the set. The HDMI input will now work until it stops working without any warning or tampering with the set. Does any information of this problem? It seems like a bug or maybe the sensor is intermittent.

could you check on tv setting for hdmi that its in digital input and not external input. as sometimes the device settings are wrong, also its best to try a different hdmi cable as sometimes the cable can become damaged.

Check your connections especially the yellow RCA connector. If it is a scart connection the video pin may be broken change out the lead for a new one

Might some how got that HDMI input port shorted?Tries tv unplug and that HDMI cable input it into another HDMI port,replug tv back about an hour later.So the tv resetting itself back to factory setting.Tv on goto tv menu,goto tv PICTURE SETTING going down to do resetting.This should resetting the whole tv Tuner signal board.These steps,should help ur tv HDMI ports functions again.

Most JVC TV's with HDMI and Digital Input have an optical sensor inside the case to sense if someone is trying to bypass the hardware encryption. My JVC was exposed to sunlight prolonged sunlight and triggered this optical sensor which disabled my HDMI ports. This may be the same situation for you.

JVC HDMI Port Fix

Turn the TV on, and enter the Service Menu. Select 2 for Self Check. Then turn the TV off, and after the fan turns off, unplug the power cord. Reconnect the power cord, turn the TV on, and the HDMI port is re-enabled.


Here's how to get to Service Menu:

Before entering the SERVICE MENU, confirm that the setting
of TV/CATV SW of the REMOTE CONTROL UNIT is at the
"TV" side and the setting of VCR/DVD SW of the REMOTE
CONTROL UNIT is at the "VCR" side. If the switches have not
been properly set, you cannot enter the SERVICE MENU.
1) Press [SLEEP TIMER] key and while the indication of
SLEEP TIMER 0 MIN is being displayed, press
[DISPLAY] key and [VIDEO STATUS] key (Fig.2)
simultaneously.
2) The SERVICE MENU screen of Fig.1 is displayed.
3) Verify what to set in the SERVICE MENU, and set
whatever is necessary (Fig.1).
Refer to the SERVICE ADJUSTMENT for setting.
4) Press the [BACK] key to return the SERVICE MENU.

Set your TV, Sattellite receiver and audio where you want it when you turn on the set. Then hit the Scene button named "TV" and hold it down till the yamaha receiver says set complete and it will turn on to HDMI 2

Make sure the control feature is disabled on both units so that they are not trying to send control signals to each other.

Secondly make sure your input is configured to hdmi for both audio and video within the receivers on screen menu The receiver usually auto senses the digital audio signal but doesn't automaticly know that it should use hdmi for video.

Your laptop has to have an HDMI output and the tv has to have an HDMI input. Put the tv on that HDMI source inpput, the laptop will sense the new device and install a driver for it, which is your video driver. Your video driver has to be capable of driving two monitors. The best bet here is to update the video drivers. When it senses the TV, the tv will show what the computer monitor shows and windows will ask you if you want to use the tv as the primary or leave the setting as they are and run both monitors. Whatever you choose, when you power down either the tv or the computer the computer will sense the change and revert back to the default settings.

The board that contains the HDMI inputs must be replaced.

the r04u comes factory with hdmi DISABLED, hook up your hdmi device, and turn r04u to the hdmi  input (input 1 or input 3)  then:
To activate the HDMI terminal: 
1 Press HOME MENU. 
2 Press /  to select “Option”, and then press 
ENTER. 
3 Press /  to select “HDMI Input”, and then press 
ENTER. 
4 Press /  to select “Setting”, and then press 
ENTER. 
5 Press /  to select “Enable”, and then press 
ENTER.


there you go

On your TV set remote are you selecting the proper input; for example when you have different devices connected to the back of your tv set, dvd player, vcr, cable box etc; you have to tell the tv which device you want to use by selecting the right one on your tv remove input selection. Hope this was any help.