Need some help please. I finally joined the club about a month ago and spent the weekend upgrading the CPU and Display ROM chips from 2.0 to 5.0, converting to LED's with an LED OCD board, installing NVRAM, installing cliffy's, etc. Now, when turning on the machine, I am not getting any sound or anything on the display. I've rechecked the connections but they all seem OK. I would appreciate any suggestions on where to focus next. I was careful to align the CPU and Display chips properly but there is a chance i messed that up somehow. Pictures below.
Thanks in advance for any suggestions!

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Thanks finnflash. I was careful to check the old chips when removing but since this is the first time I’ve done this it is possibile. I’d prefer to exhaust other options before buying new chips and NVRAM in the event they are installed correctly (and burning up the new ones). Thanks again.

Thanks lermods. Unfortunately I bent the old chips when removing them (rookie mistake!). Ribbon cables are good. I don’t think it could be the led ocd install as the lights are all working. I am thinking I must have installed the display chip backwards and fried it. Looks like I will be ordering a new one and testing it out. Thanks again.

Thanks rensh. The pictures are very helpful - I will make sure the notches and/or dots lineup correctly when I put in the new chips. Assuming this is the problem, hearing doh frenzy again will make me forget about this mistake.

Thanks to everyone for help with my issue. I am waiting on the new chips and will re-read all the advice 2x before proceeding.

MG7322 - here are pictures of mine. The wire on the upper playfield is running inside the first hex post and outside the second hex post. From there it goes past the thumb screw and then tucks back under the upper playfield. Be careful not to block the VUK when tucking back under the upper playfield. I noticed that when I was putting mine back on.

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Happy to help. Mine go through the main playfield.

Got my new chips today and installed them based on all the advice. Was super careful. Unfortunately I am still having the same issues - no sound or display. All connections rechecked and seated properly. Except the below - does anyone know where those connect? If that doesn’t solve it does anyone know a good tech in Somerset County, NJ area? Thanks

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Here are pictures of the boards - thanks and thanks for the info on Paul

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I am pretty sure, although it looks odd now that I look at it. I didn’t touch that one and machine was working fine before I replaced chips etc.

Just wanted to close the loop on this in case anyone has a similar problem. Turns out fuses at F1 for high voltage display and F23 for logic were both blown. Replaced those (and checked all others while I was in there) and everything is working again. Just need to get it back in place, level it and put the glass back on. Many thanks to everyone for their help. Much appreciated.

Congrats and welcome to the club.
I am a new owner too and love it.
Here are some things to consider in no particular order:
NVRAM
Extra VUK’s for ball to UPF
Update CPU and Display ROM to 5.0
Add cliffy’s to protect ramps
Add pinbits to protect I&S hole
Add plastic protectors (indypinhead sells them)
Add couch weld fix
LED’s
Color DMD

There are also a ton of mods to choose from.
Enjoy!

All of the playfield mods - Kwik e mart sign, I&S tv, treehouse lamp cover, in rod we trust (last 3 made by a pinside member I am pretty sure), CBG t-shirt sticker???, donut shooter rod, and bunch more I am forgetting. All depends on personal preference.

Definitely!

Welcome to the club.
Pretty sure you need 5.0 - the colordmd website will have the requirements. I installed the colordmd in mine recently and love it.

To answer your earlier questions, here are some suggestions:

1. If your game has regular batteries, install the NVRAM. Not worth the chance of ruining your boards with battery acid damage.

2. Consider installing cliffy’s. I put them in mine (except the shooter lane - see below) recently as a precaution. Replacement ramps are reportedly hard to find and/or expensive. But, as Lermods noted, these may not be needed in a HUO environment, except the shooter lane. I didn’t install in my shooter lane yet because I couldn’t get the apron off. That is on my list after a trip to the local hardware store. Also consider protecting the Itchy and Scratchy hole with a clear plastic protector - I got mine from pinbits here on the forum.

3. Consider the couch weld fix. I had no issues but put in as a precaution anyway.

4. Consider putting in playfield plastic protectors. I got mine from indypinhead here on pinside and they fit perfectly. I put these in as a precaution as well - my plastics were all original and I didn’t want to take the chance of breaking one. I think the replacement plastics are hard to find and/or expensive.

5. Probably should buy a few extra VUK forks. See post 5071 above.

There are a ton of mods you can add as well - depending on you preferences - such as Moe’s Tavern, duff beer can, kwik e mart sign (lermods sells them), donut shooter rod, side art, speaker box decals, itchy and scratchy tv (sparky here on the forum sells them along with other mods - the tv is on my buy list), and a bunch of others I am sure I am forgetting.

Enjoy!

Got mine from pinbits. If I remember correctly they come in clear plastic (what I have) or metal. I think cliffY carries them sometimes as well.

Mine has the screw/washer. Sorry but I am not sure on question 2.

Per the manual, F20 is not used (although my machine has a fuse there). Sorry for the upside down picture I am on my phone and it won’t rotate.

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Also make sure you put the NVRAM chip in the correct direction. Take a look around post 5029 (Plus minus 10 posts) for some guidance. The group was great in helping me out there.

Agree with Lermods. I had a similar problem about 6 months ago when I versioned up my roms, and added led’s with ocd board and nvram. It turns out the fuses at F1 for the high voltage display and f23 for the logic were both blown. There is a thread on the tech forum I started with some good advice and pictures.