(Topic ID: 261652)

BSD, won't boot, new boards, any ideas?


By Dheubs96

11 months ago



Topic Stats

  • 4 posts
  • 4 Pinsiders participating
  • Latest reply 11 months ago by PinballManiac40
  • No one calls this topic a favorite

You

Linked Games

Topic Gallery

There have been 2 images uploaded to this topic. (View topic image gallery).

BSD repair (resized).png
20200209_175928 (resized).jpg

#1 11 months ago

Have been slowly working my way through a very dated and unkempt #BSD for the last few months in my spare time. After hours of troubleshooting old boards with minor corrosion I decided it was time to replace all the questionable boards.

The sound board was one of the boards not replaced in the head, including the DMD board affixed to the back of the display itself. CPU, Driver board, FLIP, DMD controller boards all replaced, still, strange noise emmits from speakers and the pin fails to boot/display anything. Lights in their glory except D20 on the CPU board.

This pin was stored in a non climate, non animal controlled building, but is suprisingly in good shape. I just worry there may be a critical failure somewhere which I may be over looking, as it sat for some time (a decade or more.) Can't assume it'd be the transformer not supplying the proper output due to their resilience, so Im kind of lost!

Any thoughts, ideas and/or knowledge would be highly appreciated!

I have a video of the noises, but it is just some humming and crackling through the speakers, nothing exciting.

20200209_175928 (resized).jpg
#2 11 months ago

Hopefully it's not an illusion, but the first thing I noticed is the ribbon cable that goes from the DMD driver board directly to the CPU. The red stripe goes towards pin 1 on both boards. The red stripe on both larger ribbon cables should be up on the DMD driver board and to the left at the top of the CPU.

That ribbon cable appears to be upside down connected to the CPU top right. Rotate that one end around so that the red stripe is on the left side.

Try that and see if it boots.

#3 11 months ago

Get the MPU booting by itself first, unplug everything from it but the power plug from the driver board and power on. I’m assuming you are reusing your game rom, processor and asic chip from the original MPU? If so, double check that all the pins are seated properly and that the orientation of all chips, including the asic, is correct. Check asic is seated fully as well.

#4 11 months ago
Quoted from schudel5:

Hopefully it's not an illusion, but the first thing I noticed is the ribbon cable that goes from the DMD driver board directly to the CPU. The red stripe goes towards pin 1 on both boards. The red stripe on both larger ribbon cables should be up on the DMD driver board and to the left at the top of the CPU.

I agree. This end needs to be flipped around so the red stripe is on the left.

BSD repair (resized).png
Promoted items from the Pinside Marketplace
$ 9.99
Eproms
Matt's Basement Arcade
$ 79.00
Lighting - Under Cabinet
Arcade Upkeep

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside