I have recently purchased a second hand ACA1233n-55 which is non-functional. (This was the one that I mentioned yesterday had the damage to the cap C85, which has now been replaced, along with the 5V regulator, thanks to Jens pointers as to the value of the Cap!)
Having successfully sourced and replaced the C85 cap, the board is still not working (blank screen, power light on, but no other activity), even after various cleanings of the connector and repositioning the card. (I also have a working ACA1221 which works fine, so I don't suspect the edge connector being an issue.)
One thing I did notice was that the ACA1233n CPLDs were getting very warm to the touch with the power on. Not 'too hot to touch', but certainly 'uncomfortable to hold your finger on!' The one by the CPU slightly hotter than the one by the crystal. I wanted to check whether that was normal, or a likely sign that the CPLD(s) are faulty, or whether it might point to another issue I can investigate?
As mentioned yesterday, this card is second hand and totally out of warranty. The chap I purchased this card from assures me that it was working prior to the cap and regulator being knocked off, but I obviously can't prove this. Would love to get this working if I can, but wanted to check whether continued debugging effort was justified.
Out of interest, do you offer an out-of-warranty repair service on these cards?
(FWIW this is with a recapped B2 motherboard A1200 with timing fixes applied and powered by an original Amiga 500 4.3A supply.)