• ** REMEMBER! **The microwave can still shock you even unplugged!!

    ALWAYS discharge the high-voltage capacitor first if you even think your hands will come close to any HIGH VOLTAGE components.

    Jeff mentions this: Anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):
    ...Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it.

    From Jeff's site: http://www.applianceaid.com/component-testing.php

    Jake

FIXED LMHM2017ST LG OTR in-door display erratic

Traveler62

Premium Member
Joined
Jul 17, 2007
Messages
32
Location
Kansas City
Model Number
LMHM2017ST
Brand
LG
Age
1-5 years
Correct Model #LMHM2017ST. Display will be fine for days, then it starts showing weird characters. Open and closing the door usually fixes it. Assume it is a bad connection to the door. Checked the ribbon cable and connection in the door portion and was fine.

If I remove the microwave, will I be able to access the other end of the cable and check that connection? Is there a good detail of how to get to these connections?

Thanks
 
Last edited:

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
34,758
Location
Murray, Utah 84107, United States
You can remove the outer case. This is for a similar model but should be the same as yours:
Snapshot_1.jpg

Remove the two vent grille screws.

Remove the four screws securing the oven case to the oven. (Four on the top, one on the right side.)

Remove two screws on each side of the base plate.

Remove the four screws holding the outer case to the back of the oven.

Lift the outer case carefully from the oven. Store it to prevent damage while you are working on the oven.
 

Traveler62

Premium Member
Joined
Jul 17, 2007
Messages
32
Location
Kansas City
Finally had the Microwave removed to replace the backsplash in the kitchen. Removed the cover and didn't see any connectors loose, but removed and installed all of them anyway.

Getting the cover back on and lining everything up is not easy. The bottom assy with the sliding vent all moves around once apart. Had it back up now for two months and haven't seen the display issue return, so hopefully it is fixed.

Thanks Rick for the info.
 
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