>Eric van Es wrote:
>
>> Mike Keitz wrote:
>
>>> If you can't get anything at all on the screen you may have one of
>>> the high-temperature modules which requires more than 5V of LCD
>>> drive.  In that case the LCD drive pin needs to be pulled negative
>a
>>> few volts.
>
>> But that would guarantee that a normal temp one would loose its
>> smoke....
I don't think it would, the only difference is likely the LCD panel
itself (the chips are rated for high voltage).  So all pixels in the
panel would go completely black, holding the voltage that high for a long
time may burn it.  This test is only if you can't see anything at the
regular voltage anyway.