MC156SJ light out

EVER HEARD OF GOOGLE????

LG LMVM1935 manual
Google

That gets you to the manual.
Page 3 is the table of contents that lists oven light replacement on page 29.
Just maybe, if I teach you this you'll be able to do it yourself next time!

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a screw at the back side when removed get access to the bulb.Usually 40Watts bulb with1/2 " threaded

You'll have to remove the oven from its cavity, remove the rear panel and access the light bulb socket from there.

The service number for this microwave is 1-800-422-1230. I have seen this question posted on several sites with no answers. Also, I checked the Owner's Manual and I do not see an answer to this question. If I had to guess, I would say that if there is no access from the inside of the microwave, you may have to remove it from the wall as the access might be on the back of the unit.

I would browse the manufacturers web site until you find your mode.
The bulbs are normally accessed from either an inspection cover in close proximity to the lamp or by removing the outer cover.
Hope that helps

The oven lamp is accessible when the whole outside cover of the oven is removed. The lamps these days are a special bulb and would be available from a TV repair place or a appliance repair centre.Take the old lamp in with you to pbtain the correct part.

It's pretty simple.

It's covered on page 33 of the service manual found online here.

You can pre-order bulbs by entering your full model number (JVM1631WJ03) here.

1 To replace the oven light,
first disconnect the power
at the main fuse or circuit
breaker panel or pull
the plug.

2 Remove the top grille by
taking out the 2 screws
that hold it in place.
See video here.

3 Remove the charcoal
filter (if present) to
access the light cover
(see Remove Charcoal
Filter section).

4 Remove the light cover
located near the center
of the oven that holds
the bulb. Remove the
bulb by gently turning.
Replace with the same
size and type bulb.

5 Replace the light cover
and charcoal filter
(if present).

6 Replace the grille and
screws. Connect electrical
power to the oven.

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

If there's no obvious removable cover over the bulb (and the owner's manual doesn't address it) some disassembly may be required.

Always unplug a microwave before removing or installing any bulbs.

On an over the range type, remove the vent grille across the top and see if bulbs can be accessed there. There may be a panel on the bottom covering the light(s), instead.

If not, chances are you'll have to remove it from the wall, then remove the outer cover. If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

You can download GE owner's manuals and installation instructions here.

Once it's out of the wall, the outer cover (wrapper) will need to be removed, just as you'll need to do on a counter top model.

Be sure to put all the screws back in the right holes, since some may be special grounding screws.

Bulbs can be had in most grocery stores, hardware stores, home improvement centers, and big box or department stores.

Many models use halogen lamps. You must not touch the new one with your bare skin, as the oils will shorten the bulb life.

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

There is usually a little window inside that might remove with screws, or even snap in. That should allow access to the lamp. Check the manufactures website under product support for more info.