Worked for a few hours more on my Black Hole. My deadline to get it working by the end of August has passed :-(
Spent yesterday evening soldering on the driver board, did the optional ground modifications (about 10 jumper wires) like described on Clays repair guides (these are not online anymore).
Also played a bit with connectors, measures continuity, ..
The flippers suddenly work. Don't know exactly what did the trick.
Probably the ground modifications.. let's hope it keeps on working the next days :)
I did learn that you need to have 3 pinballs installed in the ballthrough for the flippers to work and Q to stay activated. Testing with the playfield in the up position (so you can see the relay) and then not having pinballs in the through, will make the relay not stay on. Doh.. so maybe this issue was solved before and I lost 2 days troubleshooting a non-issue..
Popbumpers still lock on immediately :(
Traced continuity in the ground and that's ok, from the green wire on each popbumper driver board, through the driver board, up to the large ground strip in the bottom of the cabinet.
There must be another short somewhere.. but I have no idea what to look for :(
Update: maybe missing +5 volts..
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