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Samsung MW82N switch on problem

At power on the display mostly shows 88:88 and occasionaly flickers off and on. When the door is open, the internal light is at half brightness and the turntable begins to rotate. Occasionally the light will flicker to full brightness. I suspect a logic power supply problem - can anyone confirm what's going on?

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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MicrowaveSvc
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SOURCE: Smasung MW7490w door/turntable problem

It's probably a defective door switch, probably the upper one, or the mount which holds the switch is broken. Opening the door while cooking (without first hitting the STOP button) is the primary cause of door switch failure. There are plastic mounts inside the microwave which hold the door switches and onto which the door hooks latch when you close the door. The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly. Usually it's not a loose screw, but instead a broken tab on the switch holder, allowing the switch to rotate just out of position.

Posted on Sep 23, 2006

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MicrowaveSvc
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SOURCE: Panasonic Microwave Turn table rotates when door is open

Found this Panasonic post in the Samsung section!

If it moves just a tiny bit when the door opens and then stops, that's normal.

If it keeps running when the door is open, that's usually due to a bad door switch or broken / loose door switch mount.

If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and
disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

Any Panasonic parts not available locally can be had here: http://www.pasc.panasonic.com/epartr

We appreciate your thoughtful rating of our answer.

Posted on Nov 17, 2007

MicrowaveSvc
  • 9085 Answers

SOURCE: Microwave oven runs with door open

This is usually caused by either a bad door switch, a loose door switch mount.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

If you someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

Please feel free to contact me directly if you need more help.

We're happy to help and we appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Posted on Apr 18, 2008

MicrowaveSvc
  • 9085 Answers

SOURCE: He's Dead, Jim! Died when door opened, but Usual Suspects clear?

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on May 14, 2009

BIKER T
  • 909 Answers

SOURCE: I have a GE Spacemaker xl1800 - Funny noise, flickering light

very possible your magnatron is faulty. Disconnect 2 transformer wires and make sure they dont short. try the program again. if no noise, replace magnatron:capacitor and HV diode Please i strongly suggest an electrician help you as it is truely dangerous in there. .

Posted on Sep 17, 2009

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1 Answer

Sharp R-9H84B-display black, cleared display shows "Conv Mix, 88:88 Auto". Short time all dark again. Hit clear happen 2 times then, all dark, no power, can't clear won't start, nothing works.


R-9H84B - May 29, 2017

I would suggest pulling the control board out and looking on the foil side (opposite the component side) for "ring cracks," most likely on the low voltage transformer's connections.

The board may have the screen-printed reference designator "T1" near the low voltage transformer.


ring_cracks-gr02aocewnccyez3v1hdhepo-1-0.jpg

Also be sure the fuse is not easy to turn with your fingertips when it is in the holder. If it is, the fuse holder is too loose and must be replaced (not just squeezed with pliers).

You can order a fuse holder, part number WB06X10034 for $6.49 (subject to change) from the Pros here.

If you have any keypad issues, please note that the membrane keypads for this model have long been discontinued.

FixYa does not directly notify us experts of responses, so if you have other questions, please contact me directly.

- William E. Miller, AS-EET
pupista@gmail.com
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

May 28, 2017 | Sharp Microwave Ovens

1 Answer

Open door and internal fan engages.


One of the door interlock switch could be bad.

Nov 14, 2014 | Samsung 1.8 cu ft Over-the-Range Microwave...

1 Answer

Microwave will not run a cook cycle. Touchpad functions until door is opened or start button is pressed. When door is opened display goes dark. When door shuts display lights all characters and then says...


BEFORE DOING ANYTHING DISCONNECT OVEN FROM POWER. I do NOT recommend doing repair by yourself, if you NOT are really very familiar with electric repair, or have at least basic training in electric device repair and maintenance.
"When door is opened display goes dark. When door shuts display lights all characters and then says "touch clock"."
Obviously, by opening door, oven gets disconnected form power line.
This is mostly caused by loose connections on wiring socket, and can be anywhere inside. Check security micro switch on door latch. This switch normally disables only running the oven when door is open, for security reasons. In your case, it seems that opening door disconnects oven from input power. Sometimes the switch is loose, or wires are not firmly pushed in the socket. If the power line wiring is loose, and by opening door looses contact with socket, it can touch metal housing inside, cause short, electric shock, serious even mortal injury and fire. This is dangerous high voltage switch, and to access it one must open oven from the back and take off the cover. I do not recommend doing it by your self.
Rem: Replacement micro switch is couple dollars.

Oct 24, 2014 | Microwave Ovens

1 Answer

Why won't my microwave oven work?


No, it's not worth the effort required to replace the control module - unless it is a commercial model.

May 25, 2014 | Sharp Microwave Ovens

1 Answer

Microwave power off, but will flicker when door shuts


Please inspect the plastic latches that should actuate the door switches. Sounds like you may have broken one when slamming the door too hard

Mar 20, 2014 | Samsung SMH9151 Microwave Oven

1 Answer

Microwave not starting


Even though your door switches appear to be fine, one of them is bad, most likely the top switch, so you need to check it.

Also try resting different resistors and capacitors on the circuit board and try to find out a square box near the transformer. There could be one pin that did not appear to be soldered correctly. If so cleaned the pin and resoldered the pin.

It may be needed for you to perform an RF leakage test. Most amateurs and even many professionals do not own an RF leakage meter. You can get one at appliance and electronic parts suppliers, costing from about $10.00 up to many hundreds of dollars for the certified models used at the professional level. You can find inexpensive RF detection devices at many retail stores such as Wal-Mart and Radio Shack.

If your microwave does not work at all and you know everything is plugged in properly and the outlet is functioning, then check your fuses and your door switch. If the internal fuse or thermal fuse is blown you will need a professional to help you replace it. You should also check the door hooks and the door release button. If they are broken, your microwave will not work.
If your microwave looks and sounds normal but isn't producing any heat, you should check the internal door switches, the high voltage circuitry and the circuit board for problems. You will need a certified technician to help you make these repairs.
If you are unable to adjust the power level, there may be a defective triac or a problem with the circuit board. If the carousel inside your microwave won't turn when you run it, the small motor that operates it may be broken.
If the display flickers but it does not affect how the microwave heats, then you don't need to worry about it. But if you are having display flickering and it is affecting the way your microwave operates, you may have a more serious problem in the microwave cabinet.
If your microwave buzzes loudly and produces no heat you probably have a defective power diode, magnetron or high voltage capacitor. These are all things that can be replaced or repaired by a qualified technician.


Hope this will help you. Good Luck.




Sep 15, 2011 | LG Microwave Ovens

1 Answer

I am having a problem with my Panasonic Microwave oven. the operating panel is a touch type one. Now whenevr I am pressing any button, I am not getting any beep sound nor the display panel is showing any...


Hi and welcome to FixYa. I am Kelly.

This can happen when there is a power failure. Usually there is a PF in the display but you can also get 88:88

Try this first: Press stop / pause or cancel then clock and try and set the time. If at that time you do not get any beeps your control board most likely has a problem. To dig deeper if you wish to have more assistance I need your complete model number to possibly troubleshoot.

Thanks for choosing FixYa,

Kelly

Oct 21, 2010 | Panasonic Microwave Ovens

1 Answer

I have a Smeg FME24X 900 Watts Microwave Oven, and has stopped working, no power but occasionaly the display lights for a fraction of a second, any ideas? Have tried replacing fuse in plug but still only...


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Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Sep 08, 2010 | Smeg FME24X Microwave Oven

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Samsung MU3250W Shut down


It could have been steam or humidity.

If this is an over the range model, be sure you always use the hood vent exhaust fan when you're cooking on the stove top.

Whether it's a counter top or over the range top, always be aware that the cooling fan is running when it's cooking.

When in doubt feel for air flow through the vents.

Good luck.

Oct 19, 2008 | Samsung MU3250W Microwave Oven

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