Broke My Donkey Kong

[curtis-r]

I have a 2-board upright DK unit.  I'd been having some alignment display issues and realized that one of the pots for horizontal position was replaced with a fixed resistor.  I have an extra DK board from long ago, so I took the pot from that one and replaced the fixed resistor.  I made things worse (no photos, sorry), so I decided to switch back the pot and use the old board, which I think only had a bad EEPROM, so I swapped those.  Now I've really messed things up.  Any ideas what I screwed up based on this photo?

[ChadTower]

Looks like you made it into a Super Breakout board.  Just a guess.

 

[curtis-r]

Looks like you made it into a Super Breakout board.  Just a guess.

Then can you help me get the paddle working 

[Gray_Area]

Klov folk'll probly know exactly what's going on.

[curtis-r]

Who?  I can't find a member by that name.

[Furry131]

Klov is a site

 http://forums.arcade-museum.com/

But there is a few people on there that are on here.  Be patient I'm sure someone will know what you did

[curtis-r]

Man, I feel like such a newbie.  My MAME and arcade cabs have been so stable that I've been out of this world for too long.  I now remember KLOV & will try that site too.  Thanks.

[curtis-r]

Good idea on KLOV.   I started the following thread & got a bunch of help.  Unfortunately I think I may have fried an EPROM, but I have a little more debugging to do.
http://forums.arcade-museum.com/showthread.php?t=276235

[dirt]

this might be some help. http://www.brasington.org/arcade/tech/dk/

[mgb]

Just as a good precaution, you can also try reseating all socketed chips and verify they're in correctly as this can be an easy way to fix issues before going too deep.

[ChadTower]

Reseating a chip doesn't fix anything.  It only temporarily reestablishes a bad contact.  If reseating a chip brings anything back to life then the socket needs to be replaced.

[mgb]

Reseating a chip doesn't fix anything.  It only temporarily reestablishes a bad contact.  If reseating a chip brings anything back to life then the socket needs to be replaced.

Thats not entirely true. Pulling a chip, cleaning the legs and reinstalling can fix the problem. all poor contact issues are not bad sockets.
of course if socket is bad, then it should get replaced

[RayB]

Congrats on getting to the kill screen.

[ChadTower]

Thats not entirely true. Pulling a chip, cleaning the legs and reinstalling can fix the problem. all poor contact issues are not bad sockets.
of course if socket is bad, then it should get replaced

In this scenario you have put a clean leg back into a dirty socket.  The corrosion is not removed.  It's just reduced.  It will come back and you'll have the same problem later.

[Karetaker]

Before you go to crazy make sure all the pins are actually in the sockets. Also make sure you didn't bend any pins under. You will have to pull them back out to check for a bent under pin. I would check that before anything.