How to Troubleshoot & Replace Ge AP3792790 / WB27T10500 Oven Electronic Control Board

Went online with model number to research. Appliance Parts Pro came up, I have used them in past. After checking online, didn't have enough details, so called. Spoke with technician Andrew Shelton, described problem and troubleshooting I had performed; continuity, resistance checks, sequencing, etc. This was a strange, but not unheard of problem! After a brief hold, he came back with questions and recommended part. This interaction took 20-30 minutes, not sure exactly. What was great was no rush, no hassle, direct questions and answers, stayed on the phone while I did some additional diagnostics, . Ordered part on Friday, arrived Tuesday. Installed on Wednesday, Had problems with GE's ribbon connector! My wife treated me to some great cookies that afternoon, mmmmmmm! Thanks Andy. 

Replaced board by removing unit from wall; however I realized I didn't have to remove the unit to replace the board. I did inspect the unit to make sure that it was only the board that was causing the oven not to operate. A little more work but well worth it. When you replace the board make certain the connection to the lighted panel were you see the clock and temp reading is well seated or else nothing will work. 

Replaced the hi-limit switch and oven control. 

I noted that two other people had the same problem and eventually they determined it was the Oven Control Unit, located behind the control panel. I decided, with the 365 day return policy, that it was worth the risk (of just losing the postage cost) to immediately try out a new Oven Control Unit to see if it fixed the problem. It did. This saved me from having to pull out the unit from the wall and test various components. The replacement of the Oven Control Unit was fairly simple. After turning of the power, of course, I double-checked the part number and compared the layout of the unit to verify that the replacement part was the correct one. Then, I made a note of where the various differently colored wires attached to the unit before I started. For each wire attachment, I had to use pliers to remove it (except for the multi-pin and ribbon connections). The ribbon connection required a slight jiggle to pull it out completely - it got stuck after pulling it out about 1/4-1/2 inch - by moving the ribbon slightly away from the edge of the control unit, it freed it. The whole replacement process took about 1 hour. 

Checked elements continuity with output relay(s). All connections and heater elements good, left the drop down relay as the culprit. I ordered the replacement board sent from you fine folks, installed it, and all is well again. Delivery time was great, thanks! 

With a new control board. 

Replaced the oven control. 

After reviewing the problem I narrowed it down to 2 things that could be wrong. I called the Appliance Parts Pros and talked to a tech. She said it was the oven control board so I ordered one. Sure enough that was the problem. The oven works fine now and it took me less then 1 hr to fix. I could access the control board from the front, just had to be careful and get the wiring back on the way it came off. The tech told me to take a picture of the wiring before I disconnected, That was great advice. 

Ordered parts online ... they arrived the next day ... installed them and it works just fine. 

Replaced oven control.