Why does everything disappear when we connect HDMI?

Hi @ahmetloci

What is the model number of the TV?

Is there an error message being displayed on the screen e.g. no signal etc?

Have you proved that the signal source i.e. where HDMI cable is connected to e.g. laptop, video camera etc, is working OK when you connect it via HDMI to another TV or monitor?

Have you tried using a different known working HDMI cable?

What have you tried?

Yes, I changed it.I used it on another TV and it works.In fact the TV works perfectly before putting the HDMI but after me mom that you put HDMI it no longer works

@ahmetloci

Please provide the model number of the TV?

The TV no longer works at all or just not when using HDMI?

If not at all, check the HDMI connector port in the TV for damaged pins.

If there are there may be damage to the mainboard in the TV but without knowing the model number it could be another board e.g. HDMI board (if there is one that is)

It is unwise to insert a HDMI cable into a working device. It is always safer to turn the device off, plug in the HDMI cable and then turn the device on. That is providing the port is OK and hasn't been physically damaged