SOURCE: Korg PA800 not booting up
I suspect you have aa pwer supply problem that is supplying low voltage to the unit. The display will light at low voltage but circuitry will not run when voltage is low.
SOURCE: i got korg pa800 my
There is a contrast control. Look for it in your user manual. On page 14...bullet #25... You press the menu button and hold it and rotate the dial to adjust the contrast.
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