Hi everyone, I have the mod mentioned in the subject, it worked perfectly until now. One morning when I wanted to use it, it completely froze, it doesn’t detect button presses, the display shows the same thing. I took out the battery, it didn’t turn back on, only when I plugged it into the mains via USB (the battery is fine, my other Brunhilde SBS works correctly with it, I also tried it with another battery and it’s the same). I don’t usually charge it via cable, only with an external battery charger. Has anyone experienced something similar? Can the problem be solved? Does anyone know a repair person? I hope it won’t be junk, because it’s a prized piece of my collection. 
Thanks in advance for all help!
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My suggestion is to take it apart by all means.
Then of course cleaning too, etc
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Okay, I’ll see if a clean solves the problem, thanks for
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So thank you for the tip, a bit of cleaning in the battery channel and at the 510 connector was enough, it probably got moisture. I’m eternally grateful, I don’t know how I didn’t think of that! 
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Unfortunately, it worked for about half an hour, then it froze again. We’ll have to take it apart and see.
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