How to Troubleshoot & Replace Ge AP3883432 / WB27X10856 Digitron

Part had to be one of 3, chatted online with AppliancePartPros.com and they determined it was the Digitron ($180 part). Ordered it immediately, came quickly, called APP for installation instructions, they forwarded PDF Schematic which helped show HOW to remove the cover correctly, etc to access the part. It was a "plug and play" part, took maybe 20 minutes tops and it works beautifully. My idea of success is that it works and there are no leftover screws! Appliance repair guy wanted $400..BTW, this is a convection oven microwave combo, retail $1,000 so repairing vs replacing it was a no brainer. I am a 70 year old female..going to replace my gas fireplace pilot next... 

Replaced Digitron NOTE!!!!!! On line Manuel was wrong, had to remove entire case panel to access digitron. Once case panel removed then unplug Digitron and remove 4 small screws and replug new part and tighten 4 screw holing it in. Next reinstall metal case panel and tighten screws, then plug in power cord and put back in cabinet. Need 2 people to pull out and put back in to prevent dropping. Easy with good instructions!!!!!!!! 

I saw some reviews that it was either the transformer or the digitron. To simplify the process I decided to replace both since the hard part is taking the unit apart. Upon doing the swap and reinstalling the microwave, the display was much brighter though it was flickering around quite a bit. After about 30 minutes, all this calmed down and all appears to work perfectly now, though still brighter. Apparently the old Digitron had grown dim over the years as well. At this point I would say it was a success! 

I checked all the fuses and thermal resisters, capacitor for continuity all were good. No one in my area wanted to work on the appliance. So, I figured it was the display or power circuit board. I replaced both and the oven is fixed. 

Tried 2 other parts before figuring out it was the digitron. Took the unit out of the wall and placed it on the kitchen table. Removed the case with a cordless screwdriver. I disconnected the wires from the capacitor because I heard a charge can be held and did not want to risk being shocked. I removed a few screws to gain access to the front panel. Unscrewed the digitron and disconnected the wire connector then screwed the new one in place. Plugged the connector and screwed everything back together. Very, very easy. 

I got a new display part. To replace it I took the oven out, and then needed to remove the side panels, and the housing so that I could get to the front panel. I unplugged the electronics and unscrewed the front panel. Then I was able to easily unplug the old display and plug in the new one. I screwed all the pieces back in and it's bright and shiny and clear now - better than new! The hardest part was assuming that the front panel would be easily removed like I saw in videos for other microwaves. Not so with this one. I just had to keep unscrewing and make sure the right screws went back in the right place. 

Removed microwave from cabinet. Removed microwave external metal cover. Moved screws holding display. Plugged in new display. Reassembled and reinstalled in cabinet. I chose AppliancePartsPros as they had the lowest price on the item I thought I need. These people are great. I originally order the incorrect item. I received the correct item the day after I was guided to buy the correct item. Thanks guys; I'm a very happy customer. 

After reading all the reviews, it was tough to decide which board to replace. I ended up replacing a transformer, the GE power board, the display control board, and the digitron in that order. Each board seemed to make some improvement in the brightness and touch response. But the flickering didn't stop until the digitron was replaced. Since it's operating like new, I decided to leave all three new boards in place. $650 in parts was better than the $2000+ for a new built-in microwave. 

The new part was ordered. Received fast. 

Replaced the digitron with a new one. A very easy job. My microwave is built in so it took me longer to get the microwave out than it did to replace the digitron.