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- > Do-It-Yourself Appliance Repair Help > The Kitchen Appliance Repair Forum > jenn air jdb7910aww dishwasher no power to keypad

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 Posted: Fri Nov 12th, 2010 12:14 am
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fred_123
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Hello all, 

My Jenn Air jdb7910aww dishwasher just stopped working.  Everything was fine - solved the detergent problem weeks ago - then last night I set it to wash with the delay button - woke up in the morning, the cycle hadn't even started and the keypad was dead.  No lights - pressing the touch-pad buttons does nothing.

Checked the outlet - yes, there's power. 

Pulled it out and turned it over - nothing obvious- no dangling wires or anything.

Held down the Lock button for 3, 5, 10, 20 seconds - nothing. 

Tried opening and closing the door and pressing it closed - maybe a door sensor - nothing.

OK - so where does one start debugging a no-power touch pad on these things?  I have basic electrical test equipment.

Thanks.

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 Posted: Fri Nov 12th, 2010 12:35 am
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RegUS_PatOff
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 Posted: Sat Nov 13th, 2010 10:48 pm
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fred_123
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This looks helpful - thanks. Any advice on which end to start with will be very appreciated.

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 Posted: Sat Nov 13th, 2010 11:03 pm
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RegUS_PatOff
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It may be a bad Power Line input connection under the ToeKick Panel.

Those Wire-Nuts get loose, corroded, etc...

click on picture




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 Posted: Sun Nov 14th, 2010 10:58 pm
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fred_123
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Found it - fixed.

Took the inside panel off the door and followed the supply from the connection box behind the toe-kick.

- up to the door handle, micro-switches checked out ok and power was getting to the printed circuit board when the handle was closed

- fiddling with the circuit board, I noticed a loose capacitor - maybe a cold solder joint, but on C301, a big blue rectangular box of a capacitor, one post was completely loose.

Pulled the board off, re-soldered the connection, put it all back together, and, bingo - one working machine.

Thanks for the background info that motivated me to investigate this further.

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