I have for some time tried to get in contact with Rotten Dog about some boards I bought. No success. I am not in US so making a call is not ideal (not that I have a number). Is this normal for them to be hard to reach? Is there some unofficial ways to reach them that anyone like to share with please send me a PM or write here.
If this fails I guess I just post me questions here but I like to have the manufacturer deal with this since they claim to do so on their site. "Please feel free to contact us for questions / issues / concerns on any of our products".

Thank you for that sadly bad news.

I guess I make a new post about my Rotten Dog questions and hope someone have answers that helps me out. Hate to have to spend a lot of money another time when this is supposed to solve my original issues.

Well I ordered stuff and got it but now when replacing the boards it is not working as wanted. I just needed some guidance I guess (hope).

It's a Space Shuttle I had for 20 years or so. When moving to the Caribbean I thought I would put in new boards in it. It started to show signs of wanting that. So I bought new boards and put that into the container with the game. Now here I started a renovation of the game. Took it all apart and also replaced the bulbs with LED and new coils.
It will run with the Rotten Dog boards but I have no sound. Just the static noise that always been there. There are 6 flashers (Space and Shuttle) in the center of the playfield that is lit up all the time. The rest of the game seems to work just fine (apart from 3 player displays but I think it is the displays that finally gave up and needs to be replaced).
I can't remember when I got the boards if U24 and U26 is supposed to be empty or if I should get them from the old board. I got new sound proms and discarded the old. I read a bunch of threads and done some voltage checks and it seems to be fine. Not exact but darn close to what it is supposed to be.
One thought I had is that the difference in Hz (This game came from Sweden 220V/50Hz) would affect the game but I cant really find any information anywhere that they are changed when shipped to Europe to start with. I was supposed to convert it back to 110V/60Hz but at the moment I test it on 220v/60Hz.

Any insights in any of this things? I made another post with more exact descriptions but no one have replied yet. So if you know or know anyone that might know I greatly appreciate any info.

Why, what was it doing?
Sometimes it would get stuck in boot test. Sometimes it would show only 3 players. Sometimes in game it would shut down.
I had a friend pinpoint the issue on the MPU but when that was fixed something else was bad. So I decided to just get a new Rotten dog MPU 9211 and WDP 3211A.

Normally, it's not necessary to replace coils unless they're damaged, burnt up, or swollen.
I just thought that replacing them now and keep the old as spare for the future. It was the Flipper coils and the one for the drop target.

I would suggest giving your tech thread a bump: https://pinside.com/pinball/forum/topic/space-shuttle-and-rotten-dog-issues#post-6141354

Will do that.

Thanks for helping!