I got a call for a Frigidaire gas range (freestanding) with a list of complaints:
1. Burners no longer sparking
2. Interior light no longer coming on when door is opened
3. Clock display flickering when door is opened
4. Error codes present
5. Oven no longer bakes
It turns out my client actually installed a new board twice with no resolve. Then he had a tech come out who diagnosed (you guessed it!) a bad board. Without you guys I may have done the same thing. Afterall, he was still getting 120 volts at the outlet.
Reg posted the tech manual quickly, but told me to check if the range had been at another location and recently moved to this one. He told me to check for electrical work that may have been done to the house.
Dimitri just flat-out told me it was the power supply.
Armed with this knowledge I headed out to take on this trouble maker. When I arrived I ran an extension cord to the range from another room. The goal here was to see if the appliance would run on a totally different breaker. And guess what? It did.
Yup, no problem with this range at all. They had a failing breaker in the box outside. He called me a "genius." He just couldn't believe that, after all his time and frustration (money too), the problem was so simple.
Thanks Reg 
Thanks Dimitri
I donated a couple of beers on this one! 
