wolfman wrote: ↑Sat Mar 18, 2023 12:04 pm I checked (so far) all D0-pins from all RAM chips (RAM card) for continuity to the solderside on the mainboard (corresponding connector to J1 on the RAM card) -> D0 of all RAM chips are connected to the mainboard.

You mean Mdata 0 to 63 ...

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At the Diag Menu it display 4MB ST Ram when the card is working. There is no extra menu for the card. The ST Ram is 64bit organized and when the Diag cart display only 2MB ST Ram in total the whole Datalines are missing I think? May be you can measure from a Dram Chip Mdata at the extra 2MB card to ...

I am based in Gütersloh ...

Work with a lot of Flux ...


You can use DeoxIT 200ml D5S-6P on the VG connectors ...

Take a good Picture ...


The two 96pin VG connectors must not be oxidized. Not on the ST Ram additional card and not the two ones on the mainboard.

The problem is that the internal C-Lab SCSI Adapter picks up everything on the onboard terminators and there is no Fuse !

.. think there was fire up the TermPower Line ?

... years ago i had an offer from germany for just 100 euros for a single circuit board measuring 160mm x 100mm two sided ...

The adapter or the graphics card may have been damaged due to the incorrect assignment of the two round ribbon cables from you ... 1. Test your ET4000 cards in a old isa Dos/Win95/98 PC 2. Do yourself a favor and use regular gray ribbon cables first 3. Test whether the ISA pins B7 = -12 volts and pi...