<-- I see and repair this problem on a regular basis. Details are
here.
This failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line, as the warning label near the light socket advises.
This causes a failure on the control circuit board.
The lights can can be inoperable, or stuck on, or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.
You can get it your smart board
repaired or order a replacement part number
WB27X10935 here.
Whether you choose repair or replacement, the first step is to remove the controller assembly.
Here is a video showing how to remove a typical over the range control panel assembly in under 5 minutes.
Next, disconnect the strip as shown in the photo below, then remove the screws that hold your circuit board in the old frame.
Some connectors may have a lock.
Then carefully (since the display is made of glass) move your circuit board to the new frame, and reassembly is the reverse of disassembly.
If you choose repair, do not disconnect the keypad connector and do not remove the board screws. Leave the controller assembly intact.
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