The Microwave Power Supply Board is an OEM replacement part for GE microwaves. As the board that receives power from the outlet and safely distributes it to other electronic systems, it plays an important role in powering microwave functions. Causes of a bad power supply board include failures in its electronic components over many years of operation. Defects can disrupt or prevent stable power distribution. Symptoms of a bad power supply board include: The microwave not receiving any power and failing to turn on Inconsistent or fluctuating power output causing irregular cooking results Buzzing or cracking noises emanating from the board This GE OEM replacement part is also compatible with Hotpoint, RCA, and some Kenmore models.WB27X10860 (AP3883434) replaces 1167208, AH1021783, EA1021783, PS1021783.