Hello my name is***** do not rate until we are finished. I look forward to assisting and am very sorry to hear that you are having this problem. I want to warn you that it is possible you will need to replace a part in order to fix this. There are a few different things that can cause this and a couple different parts so we would need to troubleshoot to find out for sure. With the view finder black like that try recording a short video and then play it back, is it black?
I think you have cracked the problem buddy.
It would not record untill I opened the lcd screen, I did as you said
recorded a short clip, played back through the viewfinder ok. then
bingo the viewfinder started working in the record mode, including
the illuminated toggle light and red record indicator, which had not
been working also. Thanks a million . Andy