Question about Samsung SMH7174BC Microwave Oven

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Bulbs UNDER the microwave burned out; new bulbs don't work

Ordered bulbs from 2 different Samsung parts suppliers - none of them work; need light to shine on stove top below so cooking food is visible
We tried shuting off power to microwave before installing new bulbs and then turning the power back on-don't see a plug anywhere - should we dump this one? iT IS 2 YEARS OLD!

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  • William Miller
    William Miller May 11, 2010

    We see (and repair) this
    a lot. The problem is on the control panel, which
    we regularly repair nationwide by mail for $39.95 postpaid in about a
    week or so.
    On some Samsung models, it's expeditious to just replace the entire control panel assembly. What is your full model number from the tag on your unit?

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  • 267 Answers

I know this is going to make no sense . but in my samsung service cd it is in BOLD PRINT YOU MUST DISCONECT POWER BEFORE REPLACEING BULBS , OR DAMAGE TO TIMER WILL RESULT ! the first time you changed them did you disconect power ? if not , your board might be toast , $$$$$$$$$

Posted on Jan 24, 2009

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This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.


We'd also recommend buying top-quality bulbs.


They can blow if subjected to vibration such as door slamming or a weak floor, or electrical fluctuation, especially if they are cheap bulbs or they are left on all night.


Instead of having the board repaired, you can order a new control circuit board / smart board if that's economical, and since your sockets are bad, they will need to be replaced, too.


You can find links to helpful exploded view diagrams and part ordering help here. I recommend that you bookmark that link to your

favorites.


There's a YouTube video available showing how to remove a typical over the range control panel assembly in under 5 minutes.


If you're changing the board yourself, you'll need to detach the keypad connector:

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Some connectors will have a lock.

positivelock.jpg

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

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