HDCP 2.2 wasn't released until 2014. The LG 55G2 was released in 2012. There's no way to upgrade the TV, unless you replace it. Using a splitter probably wouldn't help. The device sending the HDCP check needs every part of the HDMI cable daisy-chain system to send back a "Yes I understand" message in 20ms.
Since a receiver isn't usually sending copy-protected video, this message is coming from one of the devices. Reset the resolution for that device to 1080p. Based on your description of the problem, you need to change the video output on the cable box. This depends on the cable box model and the guide it uses. However, either turn off the receiver with the cable box and TV left on. Alternatively, connect the cable box to the TV directly. For some, you then press Menu (for the cable box) twice to get to general settings. Then enter the audio/video section and look for the video output formats. See https://www.spectrum.net/support/tv/hdtv-picture-formats for some of the reset steps. In some cases, you may need to use a different video output to the TV to get a picture, instead of the error message, to access the menu at all.
On my set-top box, I sometimes connect the RF output to the RF on the TV when the set-top box sends a "out of range" signal. I set the TV to channel 3 (in my case) and then reset the video format. Other times, I just get the blank screen but the menu still works to reset the output format.
I hope this helps.
Cindy Wells
I am guessing that your DVD player could be broken and the laser part that reads the disc's is also not working too and the disc drive is also broken. The disc drive and everything that is attached to the disc drive needs to be replaced all together.
It could be that the board inside of the remote where the buttons are attached to are dirty and need to be cleaned with qutips and rubbing alcohol or there is a problem with it's infared sensor on the remote or on the TV it's self or pairing problems or if the remote was damaged then. In those cases I would buy another remote for your TV.
last man on earth on tape?
buy 2 machines used and now have parts( NO OTHER WAY!!!)
there is no books AT SONY or support now. it ended long ago\ 1987 ,35 long years ago/.
the free shop manual is here, 155pages
I would try and unplug the TV and all of the attachments that are connected to your TV and wait for a few minutes to plug everything back in again and see if that fixes the problem. It could be an issue with your TV's mainboard or a power supply issue.
Make sure the MUTE function has not been activated. Try turning up the volume level. Check that there are no headphones connected. Check if the issue also occurs to other device connected to the TV.
https://www.sony.com/electronics/support/articles/00023449
5 red flashes is a bad panel connection or internal panel short, very carefully take the panel connectors off and reseat them and see if that helps, unfortunately you may have a bad panel.
Probable damage to the main board caused by lightening/storm activity.
It is possibly not ever going to be a successful repair.
Being LCD it is older technology and spares will be few and far between, not to mention expensive.
