I had that exact same issue when I bought my DK cab. Like has been suggested it is likely a rom issue, it's what my issue was.
(in fact they ALL turned out to be bad)

In my case I fixed it just by installing a Braze High score save kit since it replaces the 4 main program roms,
in fact I removed them completely from the PCB.

The common problem with these Nintendo boards is the uncovered rom windows which often lead to data corruption, otherwise they are very tough, well made boards.

If you ever intend to add a save kit in the future it couldn't hurt to do that now.

I seem to remember I paid $40 for it, it added features like board test, attract sound and freeplay, all things I wanted anyway, and when I did the math it was cheaper than if I had ordered replacements for just the 4 program eproms..... it would have cost me close to $60
since at the time I didn't own a Eprom programmer.

I'm considering buying a High Score Save Kit, because I was already considering buying one anyway, once I got the board working.
So, If I understand right, the DK Save kit, will replace "5A","5B","5C", and "5E" on the CPU board. Correct?

Ian, I am still interested in that "5A" eprom anyway. Just let me know when there in!  ;)

Bad 5A:

http://www.brasington.org/arcade/tech/dk/

That's a 2532 eprom. Try reseating it first.

Reseated the 5A and Z80.. No luck. Guess, I'm going to have to get a new 5A, wish I had a eprom burner.   
Thanks for the help! ;)

That is insane!!!!!!

So I've finally managed to pick myself up a DK PCB! ....... And it doesn't work.  

So I have come here to search for help. My issue is that when I start up the game,  the game constantly resets -- showing only the "L=00", "1UP", and some video garbage ((blinking)). I do get the DK jump sound when I boot the game up (this is always good). I also notice some rust on multiple ram chips, but I don't think it is bad enough to make the game not work...but it's always possible.
I doubt the EPROMs are in wrong positions but just put a close-up of them for you to make sure. Also, the wiring and voltage feeding from power supply is correct. Hopefully, you guys can help.

Here's a detailed video on my pcb and error -- https://www.youtube.com/watch?v=9eK75AFE68w&feature=youtu.be

Here's some pictures of the pcb and error --

Blinking Error:



Whole PCB:


EPROMs:


Rust Example on Rom Chip:


Thanks in advance!  ;)

It's most likely fake, I would however point out that I am the kind of guy who'd make one just to have in the arcade so that when people came in and saw it they'd @#$%! a brick. It'd be funnier than heck to listen to them go "whoa dude when i was playing it i felt all kinds of weird man" in the back of my head id be laughing so hard knowing the truth.

I, Know Right!?!?  I would love to try and make something like that! Then trick my friends!

Buy one! Looks great for a starter cabinet!

Like John said.. You could sell the other cabs in the future! You can make a lot more than $250 on these cabs, prob.  ;)

http://youtu.be/0DUPfQCvHXw

"Nothing is higher than an Architect"

LOL!

Anyone a x-files fan!? That is definitely one of my favorites!

"The Truth Is Out There" !

Don't forget about Seinfied!  

1.
2. 3
3. Track & Field
4. Eyes
5. Jr.

YES! I love ! 

That's what I thought! 

Does anyone believe in this game!??? I've researched it multiple times, and I can't make out if it's real or not!!???

Richie Knucklez just posted this video on YouTube, and I don't get it? It looks like a Midway cab (Pac-Man) shape.

John do you know about this!? https://www.youtube.com/watch?v=iEPDixwaoKM

Just thought I would share this! There is a Galaga in the Taco Bell Commercial, along with some other stuff from the 80's!  

https://www.youtube.com/watch?v=clZBO_kBgUM

Great Game! If you have any questions about it, just ask me! I just got done working on a Stargate!  ;)

"EYES" This is a local game at my skating rink, and I would always play it because it wasn't popular.  I've always loved it! In fact, It is still there!!!!!

I'm going to see if I can buy it off of them soon.

I wonder what kind of graphics, that things got!?