I have a Flintstones which was working 100%. We left the house for about 2 hours and I came back to find no display on the ColorDMD and it won’t start a game. However it seems to boot ok (gives the startup tone) and the playfield and backbox lights are doing their attract mode thing.

I visually inspected all the fuses on the boards and none of them are visibly blown. Does anyone have anything I should look at next before I start testing each fuse for continuity?

Here’s the current state of the backbox boards:

C4712B0F-AF12-476B-A880-6C068016D091 (resized).jpeg

Update… it appears that F116 on the driver board is blown. Seems to be for secondary 12V. The 5v and 12v test points on the driver board test ok. Any idea what to look for that might have blown this fuse?

Thanks for the detailed response! I actually don't remember now what else is connected to the J116 and J118 connectors, other than the ColorDMD. I will have to check that.

I did notice the burnt pins on J120 and realize I need to redo that connector at some point.

The board at J124 and J125 is the driver board for some undercabinet lighting made by a pinside vendor. The transistor jumpers also belong to that.

Just to close this out... I got my fuses today from Marco (seems that I had every other rating of fuse other than this one!) and the problem was resolved by replacing the fuse. Perhaps I'm living on borrowed time but the game had played 100% for a couple months in this configuration so I will let it ride for now.

Thanks to everyone for the suggestions!