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Hello Amy,
I meassured the testing points with following results:
TP10 = -4,387 V
TP4 = 4,622 V
The more interesting thing I found out was, that the oscilloscope is working when it is not in the case.
A bare board without the case works fine.
When I put the board back in the case, it stops working.
In the end I shortened the spring on the back of the board a bit, because I believed it was putting too much pressure on the board.
Now the oscilloscope is working.
Thank you for your help.
Kind regards,
Mika
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