Author Topic: LG washer has shut down, no power  (Read 27486 times)

Offline Golfnut

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Re: LG washer has shut down, no power
« Reply #10 on: June 21, 2009, 09:07:22 AM »

Offline Repair-man

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Re: LG washer has shut down, no power
« Reply #11 on: June 21, 2009, 09:40:01 AM »
OK, so if you have the manual, refer to the diagnostics on page 16 and tell us the results:
1. Press the SPIN SPEED and SOIL LEVEL buttons simultaneously.
2. Press the Power button, while the above condition. Then buzzer will sound twice.
3. Press the Start/Pause button repeatedly to cycle through the test modes.
"It's only expensive if someone else fixes it for you" -
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Offline Golfnut

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Re: LG washer has shut down, no power
« Reply #12 on: June 21, 2009, 10:41:56 AM »
There is no power.  Control Panel on/off does not engage.  Control panel lights are off.  LED on main board is not on. 

I can't get to QC Test Mode.   Wish I could get to that point!


Ref.....................................................................
7. TROUBLESHOOTING
7-1. BEFORE PERFORMING SERVICE
Be careful of electric shock when disconnecting parts while troubleshooting.
The voltage of each terminal is 120 V AC and DC when the unit is plugged in.
7-2. QC TEST MODE.
The washer must be empty and the controls must be in the off state.
1. Press the SPIN SPEED and SOIL LEVEL buttons simultaneously.
2. Press the Power button, while the above condition. Then buzzer will sound twice.
3. Press the Start/Pause button repeatedly to cycle through the test modes.

Offline Repair-man

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Re: LG washer has shut down, no power
« Reply #13 on: June 21, 2009, 10:43:43 AM »
Hmm..no lights, door switch checks good. I'd say you have a wiring harness issue or were sold a bad board, since you have replaced the main board and the user interface. I find it interesting that some of the display lights up when you move the tub.

I seem to recall an issue with the RPS or rotor position switch (motor) on some of these.
« Last Edit: June 21, 2009, 10:45:55 AM by Repair-man »
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Offline Golfnut

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Re: LG washer has shut down, no power
« Reply #14 on: June 21, 2009, 10:52:54 AM »
Moving the tub "inducing" power does result in the user interface/controls lighting up, LED on main board comes on, ...stopping the tub...everything goes off...

1) could this mean that the main board is ok?  LED does come on.


Offline TechnicianBrian

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Re: LG washer has shut down, no power
« Reply #15 on: June 22, 2009, 08:53:25 AM »
Just my two cents worth. I would find the missing voltage to the board before replacing random parts.  Verify voltage into the main board on the white connector between pins one and three from the filter board.  If you have voltage, then I would suggest removing all the connectors to the main board, except the one from the filter board, and those going to the display board and see if the display comes on.  I suspect you have a short somewhere in the unit that is causing the main board to shut down to protect itself.  If that works, you can plug each connector back in until you find the one that shuts it off again.  If you don't have power when the connectors are removed, the board has failed, and then it would be time to check each component to the main board for a short circuit. 

Offline Golfnut

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Re: LG washer has shut down, no power
« Reply #16 on: June 23, 2009, 07:47:11 PM »
Just my two cents worth. I would find the missing voltage to the board before replacing random parts.  Verify voltage into the main board on the white connector between pins one and three from the filter board.  If you have voltage, then I would suggest removing all the connectors to the main board, except the one from the filter board, and those going to the display board and see if the display comes on.  I suspect you have a short somewhere in the unit that is causing the main board to shut down to protect itself.  If that works, you can plug each connector back in until you find the one that shuts it off again.  If you don't have power when the connectors are removed, the board has failed, and then it would be time to check each component to the main board for a short circuit. 


Thanks.  I did check power into the main board from filter.  I get 120v between 1 and 2 and 2 and 3 on the outbound connector from filter.  2 is green/ground.  No voltage across 1 and 3.  Again, voltage between 1 and any ground/2 is 120v.  Sam with 2 and 3.  So power is getting to the board.  Am I missing something?  LED is still not on.  I also get operating power to power switch on display.  This, I'm told by LG, is 120v.  This is with all other plugs pullled out of the main board.

Offline RegUS_PatOff

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Re: LG washer has shut down, no power
« Reply #17 on: June 23, 2009, 09:55:25 PM »
If your wall outlet is wired correctly:

1 Blue connects to (White) should be Neutral
2 (Green) is Ground
3 Brown connects to (Black) is Hot

120v between 3 & 1
120v between 3 & 2



After leaving this Earth, "Do you want the smoking or non-smoking section?"

Offline Golfnut

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Re: LG washer has shut down, no power
« Reply #18 on: June 24, 2009, 05:50:51 AM »
If your wall outlet is wired correctly:

1 Blue connects to (White) should be Neutral
2 (Green) is Ground
3 Brown connects to (Black) is Hot

120v between 3 & 1
120v between 3 & 2


Thanks.  I'm not sure what is wrong here.  This is the set-up.

From wall to plug....Plug into machine into Filter, then Filter into Main Board

1 white to blue (filter)
2 green to grd 
3 black to brown (filter)

120V between 1 and 2
120V between 2 and 3
0V    between 1 and 3



Offline Golfnut

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Re: LG washer has shut down, no power
« Reply #19 on: June 24, 2009, 05:53:10 AM »
If your wall outlet is wired correctly:

1 Blue connects to (White) should be Neutral
2 (Green) is Ground
3 Brown connects to (Black) is Hot

120v between 3 & 1
120v between 3 & 2







Thanks.  I'm not sure what is wrong here.  This is the set-up.

From wall to plug....Plug into machine into Filter, then Filter into Main Board

1 white to blue (filter)
2 green to grd 
3 black to brown (filter)

120V between 1 and 2
120V between 2 and 3
0V    between 1 and 3




 

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