dmd driver board repair part 2

OK this is beginning to become a funny story, guess I can add this to my
funny things I learned page soon.

As posted yesterday I had repaired a dmd driver board. Also have one for sale, someone asked about it, I tested it in my Whitewater pinball game, and - big problem: the display came on but was faded at the top. So I emailed the person it wasn't for sale anymore. (as I thought this driver board didn't give enough voltage). Connected the original driverboard in my whitewater pin and it didn't come on anymore. Oops ?!

Anyway, I had tested yesterday the rebuilt driver board in my Dracula. Also didn't come on. Tested it in my whitewater. Didn't work. Put in the original board in the BSD. Display didn't come on and the game even started to reset every 20 seconds. Big problems !
My first guess was that one driver board was bad and maybe had damaged the cpu (and I had killed my BSD and WW testing it).

Now I started to think (finally). 4 driver boards, suddenly all bad ? That can't be happening. Time to take out the manual and double check everything.. DUH - stupid me !!
I had put on the small flatcable that connects to the dmd the other way around.
What I thought was a marking on the pcb for pin 1, was actually pin 14.

Plugged in the flatcable correct and start to test every board and every game again.

Good news and bad news. My whitewater pinball display was a bit faded with my spare and rebuilt boards. The dots in the top line aren't bright and sometimes flicker a bit.
But when the original board is plugged in, it works fine and the dmd looks as new ?!
I'll leave the game as is, and if the display ever is really bad I'll replace it and rebuild that driver board too. (I ordered enough kits from GPE)

The rebuild and spare boards worked perfect in my Dracula pinball machine. I was happy.. my 2 hours of soldering yesterday wasn't wasted. And my spare board was ok.
Final problem then - the original BSD board doesn't work. I have no idea what caused this as it always worked fine (until now when I removed it from the game to test the one I needed to rebuild). I saw the 62 volts was missing, it was a broken fuse.
Replaced the fuse but it blew again after a few seconds..
Bad news :(

Anyway I didn't have any time to check it further, so I put in my spare board and will check the board one day..
at least now my BSD is playable again. Only need to check my Whitewater as it has a strange opto problem..