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What you’re seeing is likely due to different standby or “sleep” circuits in the oven versus the microwave rather than a fault per se—the oven’s display is designed to dim after a few seconds to save power, while the microwave keeps its brightness constant, and this is controlled by the internal electronics rather than mechanical parts like ceramic ball bearings. Unfortunately, if firmware updates haven’t offered any settings for display behavior, there’s probably no user-accessible way to synchronize the brightness, short of having a qualified technician modify the control boards, which can be risky. The mismatch is purely electronic design, not a sign of wear or malfunction, so any attempt to “fix” it mechanically or with HA597851 bearings adjustments won’t affect the displays.
