Can somebody post the PA800 Diagnostic Menu Command

The details are highly confidential and have only ever been released to engineers under Non Disclosure Agreements, who work closely with Korg in the design process. If anyone tries to tell people about it on the forum then a breach of an NDA has occurred and whoever did it could be sued by Korg. The person posting those details could have their account on the forum suspended.

Please understand that there are very good reasons why Korg want to keep those details confidential. The functions were designed for use in the factory when the keyboards are manufactured. Two of the functions can completely wipe the internal SSD and the boot EPROM rendering the complete keyboard unusable. One of the circuit boards would have to be returned to a factory for the chips to be re-initialized using specialist hardware plugged directly into the CPU board. The necessary hardware to re-initialize the SSD and Boot EPROM is not even available to Korg service centers.

If you are someone who has discovered the way to access the system diagnostic menus, then there is a high risk you will completely trash your Pa2x/ Pa800 etc, turning it into a "brick" that will no longer be capable of reloading the OS or factory data. Korg representatives have said to us several times that damage caused in this way is NOT covered by warranty. If two of the functions in the system diagnostics menus are used, then to get the keyboard working again, service centers will have to replace the complete "main board". This is the board which contains the SSD and boot ROM chips. You are looking at a repair cost of over $800 plus shipping.