Hi Jens 1 of the 3 indivision MK3s I have has developed an issue after several months of flawless operation.
The configuration tool cannot detect the indivision and it producing pink vertical jail bar type stripes.
I've spent 3 nights fault finding this before posting.
I have tried the MK3 in the A1200s here in which I have a MK3 fitted in it and the indivision problem moves from machine to machine.
1D4 2B 1D1 revisions
I tried another one of the mk3s in the A1200 where I first noticed it and it works fine.
I tried cleaning chip contacts with IPA.
I tried several commodore power supplies.
I even reflowed lisa in the A1200 I first spotted it in.