Whwn I turn on my PA800 it says Warning OTP Corrupted press media to continue!When I press media it starts to read and the instrument is working as usualy!?

I suggest a hard reboot / initialize. Istructions are in your manual or on the Korg website

The operating system has gotten clobbered. It is expecting you to download the operating system via USB. Go to the Korg site and find the download for your unit and the procedure.

The operating system has gotten clobbered. It is expecting you to download the operating system via USB. Go to the Korg site and find the download for your unit and the procedure.

SOMETIMES touch screens like those on Palm Pilots and the like, get debris under the bezel edge which presses down continually and is "out of bounds" and prevents normal operation. On Palm Pilots sometimes on slides a piece of paper strip along under the edges of the bezel to clear out debris.

You want to ADJUST the display "contrast" which is described BRIEFLY on page 15 of your user manual under

COLOR TOUCHVIEW™ GRAPHICAL DISPLAY

PRESS and hold the MENU button and turn the DIAL to set the contrast...

Hopefully your display is just set at max brightness and you can adjust it.

Refer to page 222 in your PA800 user manual regarding calibrating the polarity of the damper pedal. The setting in your unit MAY have gotten clobbered.
It is NOT clear if you have a PA800 or M50-88. If you have the latter, then read page 22 of your user manual where it says in certain modes the sustain can be set to affect only certain voices. Again, see if internal parmeter settings may have been clobbered to disable the sustain.

1. turn your keyboard on
2.hold the intro 1, by turning it on

REad this site:

http://www.korgpa.com/pa_root/en/products/pa800_soft.html

ESPECIALLY the mandatory reload of resources after the updated OS.

you have memory problem it cost $150 to fix it

Hi, have you solved this problem yet? If you have, share the solution with us please! :)