Recently picked up a nice B7 A4 Avant that has an RNS-E installed. When I bought it, there was an issue wherein the screen of the RNS-E unit was jarbled, reminiscent of a old tube TV that wasn't tuned in perfectly to the right frequency. Imagine that the screen looked like this (but with the colors of the RNS-E display instead of what you see here):
On the way home, I took a break and fiddled with the radio for a bit and happened to realize the issue was being caused by the ribbon cable that plugs into the back of the screen. I was able to play with it a bit to get it to display correctly again, leading me to believe the issue is the ribbon cable not being fully or completely seated into the connector on the screen.
This brings me to my questions for everyone here: What, if any, methods do you recommend for securing the cable in place? I had thought about using tape, but the heat generated by the LCD screen would quickly melt or soften the glue to the point where it'd no longer adhere to the surface. Additionally, since I am not well versed in the unit itself, is it possible to remove the radio to perform a fix without running into issues when I go to reinstall the unit (i.e. security codes, etc)?
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In an unrelated note... noticed some oddities about the subwoofer in the trunk. I noticed it sounds like its clipping, or that the sub is broken, but the levels are nowhere near a clipping volume and there dont appear to be any visual flaws with the cone or surround. Does anyone have any ideas on what to check, how to do it, and what can be done to fix it?
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