Shure PSM200 huge noise problem

Hi

Seven or eight years ago, I bough a used PSM200 system, and used it for several years. But about a year or two ago, it started having a problem I don't understand, and despite my best efforts to find a solution online, it appears I'm the only one with this problem (something I don't believe can be true).

Symptoms are very simple and are easily reproduced. I start using the system (on any channel free channel), and about 20 minutes later, it happens all of a sudden: I start hearing A LOT of white noise, and the system becomes unusable. I shut it down for half an hour, and we're back to square one. Rinse, and repeat.

I bought a battery tester, just to make sure I was using full batteries. Tonight, refusing to let it go, I went through the manual yet another time, and realized I own the European version (*-R8) with all channels located in the low 800 MHz. I don't think this is a real problem as all eight channels are always clear of interference when I test them, but I might be wrong.

Anybody has experienced something like this before?

 

Something happily weird happened last night. I played in wired mode for a while (the body pack has a jack input for that). I wanted to test if it would generate any noise by itself. Without any surprises, it went pretty well.

Then I went back in wireless mode, scanned the channels (all free of interference), went for channel 2 for no good reason, and started playing. An hour later, I was still playing, and had encountered no problem at all.

This could be purely coincidental, or going on wired mode might have reset "something" that fixed my problem. I don't have a clue. I will at least bring it back to practice and see where it takes me. It might fail again in two days for all I know.

Anyway. Thanks for taking the time to read my post, and for contributing. Much appreciated.