Microwave Ovens Logo

Question about Samsung SMH7178STD Microwave Oven

1 Answer

My microwave computer seems to be possessed

Hi Well after only 2 years I seem to be having a difficulty with my microwave. No matter what or how I try to heat something the E4 message comes up almost always followed by what looks like my microwaves computer trying to reset itself, and welcoming to usage as if it was new. I tried to reset by unplugging the unit, but this did not work. Any ideas? Thank you for any help

Posted by mommoore on

Ad

1 Answer

William Miller

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Samsung Master
  • 9,179 Answers

E4 normally indicates a problem with either the keypad or a sensor. Since the oven is resetting, it may be the keypad or even the control circuit board. Below is my info on keypads, which may help, followed by more info: You may also have a bad keypad, which in many cases can be replaced. KEYPAD TROUBLE A bad keypad may be worn out due to age, damaged, or it may have gotten wet or otherwise contaminated. Moisture and contamination can be caused by not using the fan when boiling on the stove top (for over the range models), direct spraying of cleaners, by storing the microwave in an unheated garage or shed, or infestation. I warn my customers to never spray cleaner directly onto the microwave keypad, since the liquid can get inside and "lock up" or even ruin the keypad or controller. Apply an alcohol-based cleaner (such as the purple kind) to a cloth (since paper towels can scratch) and gently wipe it off. I suggest to my customers that they NEVER use any ammonia-based cleaner (like the blue stuff) on a microwave, since the ammonia will crack and distort polycarbonate plastics. DISCONNECTING AND CONNECTING THE KEYPAD 1. The keypad connection is the green or blue translucent plastic strip that plugs into a connector near the edge of the control circuit board. 3. There are two tiny tabs (one on each side) on the hood of the connector that you can gently pull up on to unlock the connector. Use equal and gentle fingertip force when pulling up. 4. The old keypad strip will lift out. 5. Put the new keypad strip in, making sure both sides are down fully. (If you are not installing a new keypad, clean yours with a pencil eraser or a soft cloth and alcohol.) 6. While holding the strip down, push the connector hood back down to lock it. -- If your keypad (membrane switch) is bad, you should be able to get one here: http://www.samsungparts.com/search/search.asp 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 If you still have questions, please post again.

Posted on Sep 28, 2007

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
2answers

My frigidaire ffmv164lsa microwave is stuck on child lock.

I realize this is 2 years old, but all you do is hold down stop/cancel for 3 seconds. That also turns on child lock.
0helpful
1answer

Panasonic inverter microwave

Ring Panasonic for service or spares tel:0844 844 3899 see if they can help?
2helpful
1answer

I have a Sharp R-305KS stainless microwave. It is about 1 year old and until recently, I haven't had any problems with it. About two weeks ago the cancel button on the front panel started to work...

Hi and welcome to FixYa, I am Kelly.

This microwave has a 1 year warranty. You are going to need a new keypad to correct your symptom. Let Sharp pay for it.
http://www.sharpusa.com/~/media/15710197EE3140AD888B896ACDC912DD.ashx
(Choose "open" ) Then go to page 2 for contact information. Page 3 sates Parts and Labor 1 year.

Thanks for choosing FixYa,
Kelly
0helpful
1answer

'Start' button won't depress, seems jammed; timer knob broke off

the button is stuck because of food buildup over the years underneath the button, this happens even to newer ones after about a year of use, new microwaves are cheap and the lower end models start at only $35 from walmart I would reccomend buying a new one, newer microwaves use less power and are more effecient so a new one will pay for itself in saved electricty costs after about 2-3 years of use.
0helpful
1answer

Microwave problem - my Kenmore model 62359 won't heat

hi mark,

actually, we didn't find any solution for the problem. we just bought a new one.

thanks,
cency
0helpful
1answer

Re: microwave does not heat

Is very unlikely that there could be any other electrical failure since everything else seems to be working.
If you are able to fix it yourself then is way more cheaper just to buy the magnetron.
Click here to find the magnetron.
Before you do any work on this device, please click here to know how to discharge the high voltage capacitor and other safety concerns when working with devices that generate high voltages.
I would say is not worth it to spend more then $100.00 for a 5+ years old microwave.
Good Luck.
1helpful
2answers

Microwave comes on by itself in middle of night

We have the same problem - auto turn-on, non-functioning keys...
I called Magic Chef and they gave me another number to call:
1-888-775-0202
I called, told the rep about our possessed microwave, and they said someone will be calling to schedule a repair visit. We bought the microwave around May '08 and it is still under warranty.
Call this number and get it fixed. It is a safety problem and Magic Chef should take care of it for you.
Brian
2helpful
1answer

LG LMVM2055SB over the range microwave keys not working

Is it possible someone may have sprayed cleaner directly onto the keypad area?

This causes moisture to get into the keypad and sometimes onto the control board.

This could mean that they control panel frame with keypad (membrane switch) would need to be replaced.

Can you give more details on the cleaning?
0helpful
1answer
Not finding what you are looking for?

180 views

Ask a Question

Usually answered in minutes!

Top Samsung Microwave Ovens Experts

Muzahura Frank

Level 3 Expert

2071 Answers

Oloyede Monsuru

Level 3 Expert

1468 Answers

The Knight
The Knight

Level 3 Expert

76842 Answers

Are you a Samsung Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...