The microwave was working fine and I unplugged it to move it to a new apartment and the display now only shows a portion of the numbers. The microwave still works, but the numbers are only half displayed. Please advise as to what to do to fix this problem.
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Usually switching off and removing plug for couple of minutes solves this problem if not then its going to need replacing as a resistor has probably gone on the display board unplug it then let me know what happens ok
Not a complete answer, but may help describe problem: Our R-510B should be the same except for color, and for several years it has intermittently messed up its display. The left side two segments on the units digit won't light up. So a digit 8, without the two vertical bars on the left, comes out as a letter E reversed left to right. Any digit that uses the two left segments (traditionally labelled segments E and F when talking about 7-segment displays) comes out wrong. Every thing else works fine. I can't tell if this is your problem.
This is almost surely a bad contact at the interface between the LCD display panel and the PC board: Typically there is a "squishy" conductive strip that connects them, and I expect grease has gotten in there. If so careful disassembly and cleaning with a mild solvent should fix it. Since we can live with it, and it usually fixes itself in a few weeks, I have not got around to taking it apart.