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An Idiot Child, a Screwdriver and an LG LSC27921SB


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16 replies to this topic

#1 Frapples

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Posted 05 October 2013 - 07:14 PM

My son broke the light bulb in the freezer. Trying to replace it on his own before I noticed, he apparently jammed a screwdriver into the socket, tripping the breaker on the fuse box. Now the refrigerator and freezer won't cool. I've unplugged the refrigerator for 30 seconds a couple times, but no luck. The front display is working, as are the condenser and evaporator fans. I don't know how else to diagnose these new refrigerators. Any ideas, before I have to sell the child to pay a technician? I doubt I'd get enough for him to cover the cost.

Thanks in advance.

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#2 DurhamAppliance

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Posted 05 October 2013 - 07:58 PM

check the fuse on the mainboard. It is not removable but check it for continuity. Easy to find as it looks like a normal glass bulb fuse. You can also jump across the terminals to see if your fridge fires up. If so, your options are either solder in a new fuse or buy another board. Official policy is to buy a new board.

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#3 Frapples

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Posted 05 October 2013 - 10:17 PM

Thanks for the response. The fuse appears to be intact, and the jumping trick didn't work. Should I try replacing the capacitors, or just go ahead and replace the board?

#4 RegUS_PatOff

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Posted 05 October 2013 - 10:31 PM

you could look at the bottom of the Board to see if there are any copper traces burned up

 


.

one of my video productions: “Easter Seals: Walk With Me”

every day is Down Syndrome Awareness Day
"A Child Is Waiting" . Burt Lancaster . Judy Garland . 1962

RegUS_PatOff > www.youtube.com/watch?v=oPAY2LsKVEw

#5 DurhamAppliance

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Posted 06 October 2013 - 08:04 AM

Have you removed the broken bulb parts?

Use the test button on the mainboard and check for compressor operation. Check to see if power is going to the compressor (check at the compressor and check board con2 pin 3 & 5 for 110-120vdc)If power is going to the compressor, check ptc terminals for resistance. If infinite resistance, replace ptc. If power is not going to compressor, replace mainboard.

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#6 Frapples

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Posted 07 October 2013 - 10:51 PM

One of the copper traces that was serving as a fuse on the bottom was indeed burned out. I replaced it and it worked; the compressor kicked on, for about 3 seconds. The trace had burned out again. The board is only about $150 bucks, so instead of making this possibly worse but tempting the gods of electricity (always my nemesis), I ordered the board.

I want to thank you for your speedy and spot-on advice. Any ideas about how to give a 14 year old a clue?

#7 olyteddy

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Posted 07 October 2013 - 10:56 PM

One of the copper traces that was serving as a fuse on the bottom was indeed burned out. I replaced it and it worked; the compressor kicked on, for about 3 seconds. The trace had burned out again. The board is only about $150 bucks, so instead of making this possibly worse but tempting the gods of electricity (always my nemesis), I ordered the board.

I want to thank you for your speedy and spot-on advice. Any ideas about how to give a 14 year old a clue?

Ten dollars down, Ten dollars a week?



#8 RegUS_PatOff

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Posted 08 October 2013 - 06:03 AM

... One of the copper traces that was serving as a fuse on the bottom was indeed burned out.

... I replaced it and it worked; the compressor kicked on, for about 3 seconds.

... The trace had burned out again.

which trace ?

pictures ?

Cause ?

will the new Board burn out ?

 


.

one of my video productions: “Easter Seals: Walk With Me”

every day is Down Syndrome Awareness Day
"A Child Is Waiting" . Burt Lancaster . Judy Garland . 1962

RegUS_PatOff > www.youtube.com/watch?v=oPAY2LsKVEw

#9 bigbluediesel

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Posted 08 October 2013 - 10:59 AM

. Any ideas about how to give a 14 year old a clue?

 

Yep.  First apologize to him for losing your temper.  Congratulate him on his responsibility for trying to fix a problem.  Most kids his age wouldn't put forth enough effort to even tell you the bulb was out, much less try to fix it himself.  Then explain how modern electronics designs are so crappy and fragile that a small surge can wipe out the whole device.  Let him know it wasn't always this way.  Let him participate in the diagnostics and show him its ok to reach out and ask for help when you don't know something.  You've got a kid that obviously is in the top ten percent in ingenuity.  Nurture that or you may never see your grandkids...



#10 RegUS_PatOff

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Posted 08 October 2013 - 01:04 PM

also mention the dangers of electricity and working on "live" devices

 


.

one of my video productions: “Easter Seals: Walk With Me”

every day is Down Syndrome Awareness Day
"A Child Is Waiting" . Burt Lancaster . Judy Garland . 1962

RegUS_PatOff > www.youtube.com/watch?v=oPAY2LsKVEw

#11 PDuff

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Posted 08 October 2013 - 01:19 PM

Is this how future appliantologists are made?  I was grown from a pod.



#12 Frapples

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Posted 09 October 2013 - 01:57 AM

It's actually a thin copper ribbon between two points (see photo)


I assumed some connection on the board was the cause, its being the most electrically sensitive component, but your questions challenge that assumption. I am officially in over my head now.

Anybody know where I can get an icebox?

Attached File  image.jpg   287.49KB   0 downloads

#13 RegUS_PatOff

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Posted 09 October 2013 - 02:09 AM

that's one of the main power traces that goes to the Compressor and the Lights

How did you "replace" it ?

 

Is the Light Socket still shorted ?

Try using an actual wire from the pair of "pins" that the trace goes to on the left,

to the pair of "pins" that the trace goes to (halfway up, right side)

May have to use wire that can handle 15A

maybe # 18 wire OR # 16 or # 14

 

 

 


.

one of my video productions: “Easter Seals: Walk With Me”

every day is Down Syndrome Awareness Day
"A Child Is Waiting" . Burt Lancaster . Judy Garland . 1962

RegUS_PatOff > www.youtube.com/watch?v=oPAY2LsKVEw

#14 DurhamAppliance

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Posted 09 October 2013 - 07:35 AM

two times a question was asked regarding the light socket. Awaiting the response.

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#15 Frapples

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Posted 09 October 2013 - 04:43 PM

By "replaced" I meant jimmy-rigged a piece of copper foil.

The light socket is clear of debris and there is no visible damage or burn marks. I can't tell if it's still shorted because the fuse on the board burned out so it's not getting current.

#16 Frapples

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Posted 12 October 2013 - 11:21 PM

So I replaced the board and it fired up and has been running without problem. The freezer light even works. Interesting, the new board didn't have the copper ribbon fuses on the underside; I couldn't see any other changes in the board design. Anybody want a burned out LG board to cannibalize?

Thanks for your help with this.

#17 DurhamAppliance

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Posted 13 October 2013 - 10:41 AM

Great Job, you banged it out! 20048442yu_zps7ce394db.gif

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