PCB Fried by Lizard?

[Chris44]

It seems that a small lizard somehow got into my Hayward pool panel and met an untimely demise while shorting out the PCB. This is an OmniPL retrofit kit. I found the lizard half-burned and a pretty good scorch mark behind the board in the general area circled in green in the attached image. The fuse circled in red was also blown.

I have replaced the fuse, but the system still isn’t showing any signs of life. I have 23.5V AC at the yellow wires, so I think the transformer is good and I get 118V at the black and white wires. I can’t find any DC voltage at the display/controller connection, but this six pin connection is a little different than the 4 pin shown in the ProLogic troubleshooting video I found online, so I’m not 100% sure which pins I should be testing.

Is anyone able to confirm that I’ve tested the appropriate areas of the transformer and PCB and/or offer suggest anything else I need to test before confirming my suspicion that the board needs to be replaced? Thanks!

 

[JamesW]

Did you check these fuses?

 

[JamesW]

Can you show the back of the board?

 

[Chris44]

Both of those fuses are fine. I should probably have been more clear on my initial post… the lizard was found between the main PCB and the smaller PCB that seems to be part of a power supply. Maybe it’s just the power supply unit that’s fried? Did the best I could to get pics of that space.

 

[Chris44]

I looked up the power supply unit based on the photo I took to show the issue. According to their datasheet I should be seeing 19.2-26.4 VDC on the output. I verified the input side is receiving around 115 VAC but I couldn't get any readings on the output side. Seems like the power supply is dead. Looks easy enough to source and replace. Hopefully that's the only thing wrong.

 

[ajw22]

The lizard probably fried the rectifiers that change the AC to DC on the power supply board.

 

[JamesW]

Take everything apart and show good pictures of everything.

 

[Chris44]

Closing the loop on this in case anyone ever has a similar problem. It turns out the power supply board was indeed the issue.

I was able to find the part in question (Traco Power TPI 125-124A-J) at DigiKey.com and FedEx delivered something way ahead of schedule for once, dropping it on my doorstep less than 24 hours after ordering. It’s a very easy swap on the PCB requiring only 2 screws and plugging in two connectors.

Attached are pictures of the old power supply - looks fine from the front but you can see the scorch mark where the lizard shorted the board and burned up.

Thank you to those who took the time to reply offering assistance.