Troubleshooting Suburban Water heater not sparking to ignite

So the only way to tell is to access the board and take a look. I’ll have to recruit one of my more flexible grandkids to get up in the back of the storage bay to access the board. I think it’s time for a thorough tuneup on the hot water heater. I’ve got the anode rod to replace and am just going to go over the whole thing. Thanks