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#1 Posted : Friday, December 27, 2013 10:18:13 AM(UTC)

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Groups: Registered
Joined: 3/29/2010(UTC)
Posts: 29

Electric Dryer has no display on touch screen. I cant turn it on or wake up the display.
The Dryer has good power at outlet 240VAC
Light inside drum works fine
Door switch works fine - push it and light goes off - release light comes on.
I opened the control panel and checked/reseated all connections.
I unplugged it for hours. Retried - no luck.
Tried holding Back & My Cycles buttons - no luck
I decided to open the inverter board and check some voltages.
CN10 has 120VAC from pin 1 to 3 so inverter is powered
There should be 5VDC from CN11pin 3 to CN11 pin 7
(This is the voltage to keep the membrane and LCD in standby waiting for a key-press)
I only have 4 VDC there
When I press keys - nothing happens. I have no 12VDC or 20VDC
I measured CN11 pin 3 to CN 14 pin 8 -nothing
I measured CN11 pin 3 to CN14 pin12 - nothing
So...hoping an expert has a suggestion.
If I totally unplug the display (AP3776628) from the inverter board -
Voltage at the inverter board immediately goes to 5VDC
Plug in just CN11 of the display and it immediately drops to 4VDC.
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