I’m looking for anyone with knowledge of repairing a V-4EX, feel free to message me directly if that’s you.
Any help gratefully received.
Everything works except for composite input/output.
Guess what I really want? Composite i/o.
Details:
Updated to 1.530, factory reset, video inputs set to composite, hdcp off, set to ntsc for ntsc sources.
Composite input works when first turned on but then appears to lose sync and the image tears in half for a while then disappears from the input monitor.
The composite out does not send out anything.
The HDMI paths work just fine.
I am adding photos of the internals for posterity and the curious:
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Well I see your problem, the circuit boards are supposed to be inside the case! 
In your video input settings make sure you change your inputs from HDMI to composite.
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Thanks for the reply.
I put the circuit boards back where they belong.
I had changed the video input settings to composite.
I have a feeling that the chips or components which process the analog signals are duds, as some desynced visual noise comes through while VGA & hdmi work.
So it seems something is going wrong as the device warms up.
Inputs gradually fail and don’t work again until the thing is cool.
Output never really works at all.
Further diagnostic info in this video:
