Display comes on for a few seconds and goes off quickly
That is because your monitor has faulty capacitors. Capacitors in your monitor have a job to hold down power as it comes from the source long enough for a proper display. The only way to get around this problem is to open up the monitor (You can get a computer technician to do this for you if you can not do it by yourself). Or you can get a sharp - flat object and start opening (splitting) the two covers apart from the bottom of the monitor. You will notice finger-like structures that are holding the covers together. Make sure you do not break any of those. When you open it up, then check the circuit board where the power supply cable is connected. Check for any bulged or leaking capacitors. When a capacitor is bulged or leaking, it only holds power for at least 2 to 8 seconds then looses it. Buy the same type of capacitors and replace the faulty ones. Make sure you note the polarity of the capacitors before replacing (+ and -). This will definitely take you out of your trouble
If the microwave runs for a few seconds and then shuts off, a door switch might have failed intermittently. Check each of the door switches for any signs of overheating, arcing, or burning. Also check each of them for continuity. Replace any of the switches that is visibly damaged or that only has continuity intermittently
If
the microwave runs for a few seconds and stops there may be a short
circuit in the main control board. Check other components first,
these boards are often misdiagnosed.
If
the microwave runs for a few seconds and stops the touchpad and
control panel might be defective. There are several other components
that can cause this problem, be sure to check any other components
before replacing this board.
If
the microwave runs for a few seconds and stops the touchpad might be
at fault. This is not common. Generally speaking, if the microwave
display is working and some of the buttons respond correctly but
some don't, the problem is with the touchpad.
If
the microwave runs for a few seconds and stops the high voltage
transformer might have an intermittent short. This is not common.
Check other components related to the microwave symptom first.
If
the microwave runs for a few seconds and stops the thermostat might
be defective. Watch our video on testing thermostat
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