Question about Dacor DMT2420 1200 Watts Microwave Oven
Display sometimes is blank, other times is just disfigured. Since it is a wall unit, I have opened the breaker that feeds the unit and that occasionally fixes the problem. Other times when it doesn't, the unit will reset itself unpredictably at a later time. We have had a few power outages, which tells me this may be the result of a voltage transient?? The unit is currently working normally.
Poor solder joints are a common source of trouble on printed circuit boards. You might want to remove the control board and check for poor soldering (grainy joints, cracked solder, occasionally even unsoldered) or cables that aren't seated properly. Also, electrolytic capacitors are a frequent problem in electronic circuits. These are supposed to help filter and smooth out voltage and if they don't do their job you can have unpredictable problems. Capacitors are cylindrical parts around 1/2 to 3/4 of an inch high and around 1/4 to 3/8 in diameter. Look for swollen parts, bulging or split tops (they should be flat). If there are no visible problems the board may have a flaky microcomputer, possibly (as you've mentioned) from power transients. But bad connections are such a frequent thing with current equipment that I'd look for those first.
Posted on May 28, 2009
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Posted on Jan 02, 2017
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