Has anyone else done any control board repair on the Countryside 3500? I am bypassing the snap switch and verified the wiring. Stove shuts down in 10 minutes, like it isn't getting proof of flame. Found one trace on the control board that was bad and fixed it but still same issue. Pretty hard to trouble shoot board without a schematic, hoping someone else has been down this road. Stove is over 20 years old and is nickle and dimeing me every year. Really don't want to put a $250 board into it.