DMD Issue

[stevefrith]

The DMD on a WPC machine has just failed - blank screen.

I swapped it into another machine and the DMD is fine.

The connectors look fine, I swapped out the ribbon cable and still no sign of life.

Any suggestions welcome please,,,

Steve

 

[pinballmania]

You’ve probably lost a power supply. Meter them. You should see three dc voltages around 62v, -113v and -125v. Loss of any of these will cause the display not to work. The 62v fails most commonly in my experience

 

[Mfresh]

I have had this on a couple of machines and it was the DMD driver board that was bad. I would try swapping the DMD driver boards to confirm if that's the issue. If it is then it could need a high voltage rebuild (I think Phil and Andy sell kits) or you can get a replacement board like this https://www.pinballdisplays.co.uk/product-p/dmd089.htm

 

[Pick Holder]

Few solutions:

1-Put in a Pin2dmd or colordmd Easiest fix !

2-Buy a new HV board. I have repaired that many old boards it is sometimes just easier and nicer to have something like this:

DMD power supply PCB - Pinball Heaven

DMD Power Supply Board for sale If you have a burned out High Voltage section or missing/low voltages on your DMD driver Board, this board will take care of that! It is a plug and play replacement board for the complete High Voltage section! It also will change the AC to DC power. Suits WPC...

www.pinball.co.uk

It piggy backs onto existing board. By the time you buy components and f about for a couple of hours..... this is probably the most cost effective.

3 - The whole replacement board is double the cost of that:

Dot matrix control pcb - PinLED A-14039 - Pinball Heaven

Absolutely new development of the Dot Matrix Controller Board A-14039 / A-14039-1. Our PinLED Dot Matrix Controller Board is a replacement for defective original boards. The board has brand new innovations and has this two advantages: New Digital Section New Power Supply Section It is possible...

www.pinball.co.uk

 

[stevefrith]

Many thanks for all your constructive an helpful suggestions. Color DMD replacement is definitely not an option, so I think I'll opt fpr the DMD power supply PCB. I did swap it out with an old board I found in my spares box but it was obviously an old knackered one as one of the chips was missing - though it did have more signs of life on it than the existing board!