Both the Chromecast and Blu-ray player are new items that I very recently bought. The answer to your question is NO. It has never recognise the blu-ray.
However, it did pick up the Chromecast and showed the chromecast logo for a few seconds and it disappeared.
I have a Panasonic Smart TV as well. Both the blu-ray and the Chromecast work on it.
I am going to try what you have suggested and I will get back to you as soon as that is done.
I have gone through the Factory Reset. Unfortunately, it still does not pick them up.
Yes, I did get in.
Selected Factory reset. Pressed on OK. The screen went blank.Waited for 7minutes. Turned tv back on. Tried dongle, but to change. Still not working, unfortunately.
I am not technically good at these things at all. What do you mean by "handshake issue"?
No. I dont think I can change the motherboard.