I have a 997 with the LakeMaster chip and I am also experiencing excruciatingly slow screen updates. After reading this thread it sounds like there’s nothing I can do because the limiting factor is the 997 processor speed?

997 is working fine now. Good luck on the upgrade.

I called Humminbird today and they said that after performing the software update the head units reprogram the Interlink module. However, no other modules can be between the head unit and the Interlink otherwise the Reprogramming will fail. In my case, the Weathersense module was in-between the head unit and the Interlink module. So that is why I was receiving the “Interlink Reprogramming Failed” error message.

Humminbird instructed me to bypass the Weathersense module and connect the head unit directly to the Interlink module. Once I did this the 997 was able to successfully reprogram the Interlink module.

Once the Interlink module was successfully reprogrammed then I added the Weathersense module back and re-cabled everything back to the original configuration and everything worked.

Thanks for the suggestion I’ll give that a try. I did some troubleshooting last night and found out the 997 is connected to the Interlink through the Weathersense module. I’ll try bypassing the Weathersense and see if that helps.

When I performed the 997 upgrade I powered off the 957. I did the same for the 957 upgrade.

I’m guessing the two problems are related because the 957 gets its GPS and Wathersense through Interlink?

I just tried restoring defaults after the upgrade and I got the same results. The exact error on the 997 is “Interlink Reprogramming Failed”.

Prior to the upgrade the 997 was at v4.260 and the 957 was at v4.510.

Thanks again for the help.

I did restore the defaults prior to the upgrade.
Any other ideas? Thanks, Brad

It looks like its part 730 on the schematic “inner arm spacer”. Thank you!

I had a 332c that did the same thing. It eventually started working correctly.