Question about Samsung SMH9187 Microwave Oven

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Intermittent Power Loss

I have a Samsung SMH9187 microwave, that is just over 2 years old. The unit went dead couple of days back, no power at all, no clock, no keyboard power, no light. Checked the fuses - they are good. Two days back, I was frustrated and slapped the microwave on the side by the keyboard, and voila, it came to life. Worked perfectly fine, until I happened to close the door a but quickly today morning when the power went off again. I suspect a loose connection somewhere in the board under the keypad or somewhere there. How do I go about figuring out the loose connection?

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Take the unit apart and carefully inspect the wires under the keypad...short of that..junk it and get a new one. It seems they just don't make things the way tey used to.

Posted on Nov 19, 2013

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9085 Answers

SOURCE: Samsung Microwave model # SMH7178STD just stopped working.

This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

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

You can find Samsung-specific parts here: http://www.samsungparts.com/search/search.asp

Posted on Nov 05, 2007

MicrowaveSvc
  • 9085 Answers

SOURCE: intermittent keypad operation

A new keypad is not difficult to install, and can be worthwhile.

It's part # DE34-10139B and you can get one for $18.71 plus shipping from http://www.samsungparts.com

If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk

We're able to install them for folks who don't want to do it themselves.

Posted on Nov 28, 2007

  • 1 Answer

SOURCE: Samsung Over range Microwave

Mine just started today too. I am thinking of taking a ball bat to it. Samsung foriegn made piece of shit.

Posted on Jan 13, 2008

  • 2 Answers

SOURCE: Samsung Over range Microwave

I have the same "SE" problem. After reading this thread here, I realise it's likely the keypad problem, which explains the microwave's behaviour (no key was working).

So there were two possibilities. (1)keypad failure and (2) bad connection.

Obviously the easiest thing I could start with is to clean the connection. So I first take the cover off. Behind the keypad is a circuit board. In addition to a few connections between the circuit board and other parts of the microwave, there is a ribbon connecting the keypad to the circuit board.

Loose the plastic on the connection, pull the ribbon out from the socket. I then used spirit to clean the exposed copper connections. Put every thing back to place.

Voila, it's working again and we have been living happily ever after.....

Posted on Apr 17, 2009

  • 6771 Answers

SOURCE: display show SE from samsung microwave range hood

The keypad has a short in the membrane, which means the keypad control board will probably need to be replaced.

Posted on May 06, 2012

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1 Answer

Hi I have a Samsung SMH9187 micowave that is dead (no display, light, fan, mirowave).


Sounds like the main fuse blew. It's either near where the power cord enters the cabinet, or behind the control panel (if an over the range unit).

You may also have some type of failure in the high voltage circuit; based on your description of the symptoms.

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replace the door hooks and door release button.
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The problem is in the magnetron or the inverter board.

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The oven has no power. The outlet is hot. The unit will power up intermittently, but as soon as you try to turn it on it loses all power.


This is a safety feature of the microwave. Unplug it and leave the door open for about 10 minutes and it should work again with no problems.
P.S. My kids overheat mine all the time making pop corn.

Mar 27, 2011 | Samsung SMH9187 Microwave Oven

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Everything is working, but no heat. lights come on, turntable turns, fans run, but no heat


Hi,
Normally this would indicate that the diode in the power supply for the Magnetron (microwave radiation emitter) has failed. I would recommend that the unit be serviced by a professional in this area, or disposed of because of the following:

1 The power supply for Magnetron Tube the produces thousands of volts and can produce a lethal shock even though the machine is turned off and unplugged. Really, I'm not kidding.
2 Working on a Microwave Oven can expose you to high levels of Radiation which can immediately
Damage internal organs.

That said, there is another even better reason.
3 Microwave Ovens are now very inexpensive to replace.

Even though I personally know how to fix them, I can't be bothered.

I hope I have been of help
Happy New Year,
Best, Mark

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Blown fuse. Remove the outside cover and should be located near the area where the power cord enters the unit.

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A microwave can be dead for many reasons.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open. Then when it cools, it closes the circuit and allows power through again.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again. If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If the fuse is good, it may be an open thermostat or thermal cutout on or near the magnetron or on top of the cavity / body of the oven.

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

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

There should also be a "mini-manual" hidden inside the unit behind the control panel, which is very helpful when troubleshooting.

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

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A microwave can be dead for many reasons.

You can find a wiring diagram for model R1471 at our site:
http://207.234.249.73/mwd/r1470_wiring.jpg

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open. Then when it cools, it closes the circuit and allows power through again.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again. If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If the fuse is good, it may be an open thermostat or thermal cutout on or near the magnetron or on top of the cavity / body of the oven.

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

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

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