Motherboard issue with hot tub after power failure (Coast 2006 with Gecko pack)

[frosken]

Hi everyone, hope someone can help...I've seen lots of knowledgeable ppl help me on my Hayward aquatrol board a few years ago on this forum, so I'll try my shot...again!

I have a 2006 Manhattan 42 jet (RNM42) hot tub with Gecko Pack (model SC-CF-P122-P212-O1-AU11-H4.0-U-RL-JJC-NE-CC5). Motherboard is a 9911-5001985.

The topside is the vintage 4-button one like this: https://www.poolspaforum.com/forum/...01.jpeg.d98d6549d73ed6e589a573b91e0f3228.jpeg

Sooooo...After a planned lengthy power failure yesterday, the hot tub started up, but wife heard very odd and strange noises.

I finally got a chance to look at it tonight and the display is blank. no buttons work, but led backlight on the topside is working.

So here's the troubleshooting that I've done:

1) opened pack to look at the motherboard

2) checked input voltages (all good 120V/240V as it should)

3) checked all 3 fuses: they are good

4) Disconnected topside from motherboard to see if the pumps would start: nope!

5) Disconnected temp sensor if it would make a difference: nope!

6) When there's power to the SPA, there is one LED lit on the motherboard...looks like it is CR12

7) I didn't see any visual damage to any components on the board

...and now I'm stuck... I cannot seem to find any information about the motherboard per se. I found the troubleshooting guide and according to it, it states: change the motherboard, which, obviously no longer exists. I rather try to repair the existing board then get a replacement one.

Speaking of which, according to the geckodepot website, I couldn't find my board and options as per the replacement kit (closest I found was the same model except CC7 instead of CC5...IMHO that's close enough!) If I take the CC7, then the new board is 0610-300004. I have no clue how much it costs, but i'm expecting it'll be a swift kick in the...

Any tips, suggestions ideas before potentially looking at replacing the board?

Thanks all!

 

[mknauss]

Let's see if @RDspaguy can point you in the right direction.

 

[RDspaguy]

I typically replace gecko controls with balboa. I'm not a fan of gecko.

 

[frosken]

Thx RDspaguy... I'm trying to avoid replacing the pack, regardless if it's Gecko or Balboa. I did notice in my research that many hate the Gecko packs and convert to Balboa. My goal is not to spend 100's or 1000's on a 16 year old hot tub that is barely used. Our pool get all the action...

 

[RDspaguy]

I'm not sure if that system has low level programming, but you can't really access it without a topside display anyway. If I had to guess I'd say you got a surge and it damaged the electronics, maybe multiple components, at power-up. Unfortunately, you already know the troubleshooting that is available for this, and I have no idea if that board could be repaired. I guess you could bring it to an electronics guy and find out, but if I were there I'd probably be pricing out new controls for you. Once the board is replaced, you can test the rest but if it's a surge chances are it damaged more than just the board.
Wish I had better news for you.
Maybe if you post a pic of the board so I can see what you've got I might notice something, but don't get your hopes up.