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My 2013 ACE still has the original infamous Jensen JVR212 unit.......and shhhh.......it still works fine.....so far. I am not familiar with the Axxera and its separate video switcher unit......but lets ask some questions first.
1. Sounds like an intermittant connection somewhere. Are you sure the problem is under dash or at the radio and not at the camera end? I assume yes, since pounding on the dash at the radio seems to fix it sometimes. If you do this pounding while driving it could also be "coincidentally fixing things" and the trouble is actually somewhere else. Can you simulate the failure/fix in your driveway?
2. Any weather links to the problem......raining on camera end for example? Must be driving?
3. When you unzip tie the radio/camera cables under dash is there any one cable wiggle that causes the camera failure and restore intermittantly? That includes power and ground connections. If yes, can you identify which cable(s). You have already replaced the switcher and the video link cable so it is unlikely those items (unless they are also bad).
4. Does the Axxera radio itself work fine (other than no picture) during the camera failures.......radio etc is still powered and working OK?
5. Can you remove the radio from the dash and access the rear panel to see if flexing connection points there causes the failure/restore?
It is not impossible to have an intermittant connection at the RCA jacks (or other connections) as they enter the rear of the radio (internal to the radio, wiring, hairline cracks in cct board etc). It would be nice if you had a second device to test the video feed output from the switcher box to see if that system was reliable (would verify camera through switcher was all consistently good).
Has Thor or the Dealer changed the radio itself? Might be worth requesting a replacement now assuming you are still under warrantee.
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