Honestly, I'm not tech savvy so kindly make your explanations relatively simple when possible.

I have a relatively new Indy PBA and have been doing some upgrades - things I can handle. Y'all helped me with removal and installation of side rails and I just got that done after powercoating them black. They look awesome!

My problem is that the coin door buttons do not do anything (menu, etc.). The game plays fine, and I installed a Pinwoofer so I can change the volume. But I still need to be able to get into the menu, obviously. [NOTE: The only other odd thing is that sometimes is adds 4 players if I just try to start a 2-player game.]

The only thing I did that might impact this situation is that I installed a ColorDMD as soon as I got it. I don't think I ever tried the coin door buttons prior to that, so it may be unrelated. But that's the only major ("major" being a relative term for a newbie like myself) electronics manipulation I've done to it.

I tried to look through the manual so I understand there's a board just inside the coin door mounted on the left. But that's about as deep as my understanding goes.

If anyone has any suggestions about fuses or anything to troubleshoot, please shout them out. I've looked at the wires and to the naked eye I did not see anything obviously wrong.

Thank you, friends!

Eric

Thank you! I will do that after work tonight.

This is the CPU board?

CPU (resized).png

I inspected the batteries and boards underneath. There was a small amount of corrosion on the far left battery on the bottom.

Mostly the boards and connectors looked great. I did replaced the 3 AAA batteries while I was there. The "cabinet switches" and connectors look fine (see picture - I have connectors at J205, 207, 208 and 212).

BUT ... there was some corrosion on one Microchip (BA10339 // 320 // 170) just below the far left AAA battery (the one with some corrosion on its bottom). It's the Microchip seen in this photo next to the designation "U16" (whatever that is).

I gently cleaned that corrosion build-up off with Q-tip and baking soda/water. It looked better, so fired up the game again to see if that made any difference. Alas, it did not.

I unplugged my ColorDMD (power and display connections) and started the machine. I did not start a game, but I tried to determine whether the coin door buttons worked. That wasn't really feasible since I had no display. But I pushed the buttons to see if anything at reacted - nothing did.

I plugged my DMD power and display back in. Evidently, replacing the AAA batteries made me lose the game-specific Chroma.rom file on the DMD. So I downloaded that again and installed it anew. Now it is working again.

THe DMD worked after that, but still the coin door buttons do nothing.

Notably, when I open the coin door it is as thought it is still closed. When the door is open, I pushed on the cabinet interlock switches (the white buttons -- of which there are two unlike my Stern which only have one) and nothing happens. So that seems like a symptom of whatever is wrong. They also do not pull out (again, like my Stern high power interlock switches do). But I push and push and it's as though I'm not doing anything.

THanks again for your kind assistance!

IMG_7009 (resized).jpg

IMG_7010 (resized).jpg

IMG_7011 (resized).jpg

I can replace the whole board for about $200.

For example, the RocketCPU. I have to move over my several chips (but not the shitty one on this board).

LINK: https://www.pinsound.org/shop/en/76-6266-rocketcpu.html#/44-pinball_machine-indiana_jones_the_pinball_adventure_wpc_/174-ready_to_play-no_i_ll_transfer_my_existing_chips_over_to_the_rocketcpu

The Rocket does not have a battery pack so that's nice.

Or ... for $300 the RocketCPU will come with Microprocessor, ASIC, EPROM and NVRAM installed.

If that could solve my problem, it's worth $300.

What do you guys think?

All of that is WAY outside my wheelhouse. I can do some rudimentary soldering. I just watched a video and I couldn't even safely pull the microprocessor out, let alone do all the other stuff you just said.

Ok - new RocketCPU "ready to install" ordered. Will post here when I install it. Fingers crossed!

Thank you all for your help. I sure appreciate your time.

By this, do you mean be very careful to put them on the new board in the exact spots where they go with the correct orientation (thanks for the red-stripe tip)?

Or, are you recommending I replace my cables/ribbons/connectors?

I didn't see any corrosion near anything except that one microchip, so I'm hopeful the connectors are all still fine. I could give them a gentle brushing when I pull them and before I reconnect to the new board.

Thanks!

I have no idea why J206 is empty. I'm hopeful it's supposed to be. I looked for any stray unplugged connectors and did not see any.

I tried to look up J206 in my manual but was unable to find any specific reference to it.

Does anyone have a photo of what a properly working Indy looks like in that J205 --> J212 spot?

Could it be that J207 should be plugged into J206? I really hate to start randomly plugging stuff into new slots (even if the number of pins and blank pin spots are correct). I worry I'm going to blow some shit up!

I just looked at a video of a guy showing how to install an Indy ColorDMD - it's not a perfect view but his J206 also looks empty.

Look at this picture of a for sale ad ...

It looks like his J208 is plugged in directly below (so his J208 is empty). The wire colors look the same as mine that's plugged into J208.

The spot below is labeled "switch rows". I wonder if that could be my problem. Mine is empty.

Indy boards (resized).jpg

Thank you!

I can't really understand the switch matrix in the manual. It's all Greek to me

Are J905 and 906 on the circuit board to the left wall inside the coin door?

UPDATE: I installed my RocketCPU ... drum roll ... you guys were totally right. The menu door buttons now work fine! What a relief.

So I will take your advice and sell the OEM CPU to anyone who wants a small challenge. Hopefully it's just that one chip that was affected, and a clever fellow could replace it with a fresh one.

Thanks to all - especially LTG for his guidance!

Thanks for sharing - I'm frankly surprised that MPU did not give me more fits than just the Menu buttons.

Keep us posted!