Thread Number: 78787  /  Tag: Modern Automatic Washers
Kenmore/LG Board Failure
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Post# 1027706   3/22/2019 at 14:55 by Stricklybojack (San Diego, CA)        

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.
So I buy this near new washer with the understanding the rear main board had been replaced to fix the suddenly gone dead washer, but to no avail. So then the theory became it MUST be the other boad, the control panel board. Original owner gets fed up places an ad, and i enter the picture. I planned on simply replacing that control panel board...if i didn’t get lucky and “fix” the machine with a motor board reset....i didn’t get lucky. Not by a long shot as now that i replaced the control panel board the machine is still dead. The power cord is good btw.
So now i am wondering about that rear board that was suposed to have been replaced. First i notice a screw missing, likely dropped by the repair tech who replaced the board.
I removed the board to check for burned components and spotted what you see in the (last) pictures. Is it anything?


  Photos...       <              >      Photo 1 of 4         View Full Size


This post was last edited 03/22/2019 at 19:43
Post# 1027709 , Reply# 1   3/22/2019 at 15:26 by henene4 (Germany)        

Yeah that cap shouldn't look like that.

At that point I would just tear it to bits or find something you could trasnplant some components to.
I would dare to say that the facia should basicly fit 1-1 on a simmilar speced LG machine with a simmilar main board.

I would also dare to guess/suggest that the fault might have been in neither of the boards and more towards a line-in filter shorting or something along those lines.



But keep in mind these should have 3 boards if I am not entirely mistaken.
The UI board, the main PCB and the MCU (if they haven't integrated the MCU into the main PCB by now).


Post# 1027715 , Reply# 2   3/22/2019 at 16:37 by DADoES (TX, U.S. of A.)        

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You can also take the board out of the housing to check for burns on the back.


Post# 1027716 , Reply# 3   3/22/2019 at 16:45 by Yogitunes (New Jersey)        

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a lot of times when a machine has two boards, and one needs replaced, it is usually best to replace both at the same time....

Post# 1027718 , Reply# 4   3/22/2019 at 17:03 by kb0nes (Burnsville, MN)        

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I'd go out on a limb and say that capacitor is DONE. For a better look pull off the black plastic insulator disc on the end and look at the aluminum can itself. My guess is that it is split and that cap is shorted.

Post# 1027841 , Reply# 5   3/24/2019 at 08:56 by imperial70 (******)        
Electrolytic Capacitor

I have seen (from my years in manufacturing electronics) when electrolytic capacitors are installed backwards they may operate and crack like that. However that looks like a power control type board or at least that section is a power supply. Typically an electrolytic cap will "explode" instantly when powered on.
So perhaps that cap was damaged by some type of surge. If there were a surge it may just take out other boards depending on the design.

You may want to try replacing the cap and see if the machine starts to operate? Be careful to observe correct polarity of an electrolytic cap.

-paul


Post# 1027848 , Reply# 6   3/24/2019 at 11:26 by cfz2882 (Belle Fourche,SD)        
LG potted boards...

too bad LG PCBs are potted in some sort of resin-makes repairs (and parts salvage)much more difficult...Replacing that cap could still be done though,just will need some Dremel too work.

Post# 1028035 , Reply# 7   3/26/2019 at 12:12 by speedqueen (Harrison Twp, Michigan)        

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Here is a replacement capacitor, American made by CDE(Cornell-Dublier) available for a few dollars from Allied Electronics



CLICK HERE TO GO TO speedqueen's LINK





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