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depends on what you plug into on back of tv
is it a dvd player with a hdmi cable ?
or is it a tv antenna cable ?
or is it AV cable ?
The input select on the tv menu must be the same as the port you plugged the cable into
DTV = Digital Tv
AV1 = Av input 1 the yellow plug type cable red and white audio plugs
HDMI1 = HDMI1 port
HDMI2 = HDMI2 port
HDMI3 = HDMI3 port
HDMI4 = HDMI4 port
component in looks very similar to av in so if using av cables
use av1 in port rather than component in .
If you plug the Roku into the back of the TV in an HDMI port, you need to hit the Input button on the TV to change (probably) from HDMI1 to HDMI2. Once you are on HDMI2, you should see the Roku emblem. Then you need to set up the Roku to see your wireless signal.
Plug all cables in the ports in the back of your television, the use the remote of the television select Source scroll up or down for required hdmi channel select buy stopping it on the channel then press ok
hdmi is auto detecting and shouldn't need to be turned on. try plugging your hdmi1 device into the hdmi2 slot. if switching devices around doesn't get hdmi2 working, that jack is likely broken. all the hdmi ports go into the 1 main board inside, and a lot of times you would have to replace that board to fix. if only 1 jack now works, you could also get an hdmi switcher, and then plug all your devices into that, and then just plug the switcher into the working jack. let me know if I you require further assistance.
Try first by using another port. Select HDMI2 and select proper "Input" from remote. If you get the same results, cheap HDMI cable. Replace it. If it is only on HDMI1, then there is a problem with the contacts. Warranty or just use HDMI2, 3 or 4 etc. Worse case senerio, you can use the 5 cable component cables as they can also carry HD signals.
First of all connect the Direct TV box to HDMI 2 and see if it works there. If it does then the next step is to connect the DVD player to HDMI and see if it wors there. If not then connect the DVD player to the TV using the component inputs and if the DVD player works on those. If it does then maybe the HDMI interface in the DVD player no longer works as it needs to communicate with the TV.