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batesdj  
#1 Posted : Friday, September 25, 2009 10:42:17 AM(UTC)
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batesdj

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The membrane start button sometimes doesn't work, and the leds on the right side of the membrane panel are dimmer than the others. I got into diagnostic mode ('d' display) but only got 00 (no diagnostic). However, I couldn't get it to go into system check mode (damp dry + signal+) in order to test the membrane. Don't know if I need board, membrane, both or neither.
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denman  
#2 Posted : Saturday, September 26, 2009 4:30:40 AM(UTC)
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denman

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Here are your parts
Replacement parts for MAYTAG MDE5500AYW | AppliancePartsPros.com

Here is a service manual
http://www.servicematters.com/m...ibrary/docs/16023110.pdf

The first thing I would try is cleaning the connectors. See Below.
Next I would check out the keypad with a meter.
If the keypad checks out, then odds are the control board is shot.
But it is a bit of a crap shoot unless the keypad shows up an actual fault.

Connector Cleaning
Unplug the unit
Open it up
Remove the ribbon cable from the keypad to the control board at the control board.
Clean the edge connector.
If it is the type where there is not a connector just the insulation is removed, it can be cleaned with a pencil eraser. Do not use an ink eraser as it is too abrasive.
Check the tracks in the ribbon cable for hairline cracks. A magnifying glass helps here.
Would not hurt to clean the connector on the board. Use electronics contact cleaner or isopropyl alcohol and a tooth brush. Be gentle and do not reconnect till all the solvent evaporates.
Reconnect everything and give it a try.
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