If you had done your Consumer Reports back in the day, you would have found that Sharp has notoriously frequent display issues. With this in mind, you might contact Sharp for suggestions. They know their reputation, and are counting on the consumers notknowing.
Peter Wieck
Melrose Park, PA
On Sunday, December 24, 2023 at 11:22:45?AM UTC-5, legg wrote:<snip
dream on
I've seen LCDs that have obvious damage/discoloration
and flakey elements before, but never something that
was permanently, uniformly dark.
There's no carbon press strip to degrade, just 15
solderable in-line pins.
I would suspect the controller chip, or its ceramic
resonator, but the chip seems to be performing normally.
The unit runs.
"All necessary wiggles being delivered to solderable pins" -
Not sure what this means so I'll make an inference:
All the LCD segment lines change state appropriately?
Checked voltages on all segment pins at the same time
(with perhaps a 16 line digital analyzer)?
Bias voltage on the LCD correct? If all true then the LCD is dead.
Does this model have a separate LCD controller chip or does it use a micro with a number of DIO lines?
LCD display is dark.
All necessary wiggles being delivered to solderable pins.
Backlight visibly ON.
Unit runs without indication.
Is it toast?
Custom unit for Sharp microwave - only replacement is
full panel at us$200. Unit retails at us$360.
'Light Commercial' duty stainless - in marketplace
since 1999 and still sold.
Also requires replacement lamp and stirring reflector
motor.
RL
Was the product sitting around a long time unused?
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