Marshall CV355-10X issue

Hi, A noob here with a query about a mysteriously non-functioning camera. We have a pair of Marshall CV355-10X cameras in our church, and recently one of them stopped working without any kind of warning...one day it was perfectly fine, the next day nothing.
It still powers up, red light on the back but I get no image from it. I sent it off to our A/V people and the response was "it's broken. Do you want us to bin it and supply a replacement at around £1,000?" Well the answer to that was No. I collected it and brought it home today. Do any of you geniuses have ANY advice that could help me please? Many thanks. Drew

Do you know the Konami code? It won't help here.

CX Code.png (62.99 KiB) Viewed 410 times

If this doesn't get you menu on the HDMI out it may be curtains for CV355. Perhaps this will provide solace.

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Good Luck