SSD Media Error Format SSD ? Press Media Button to conferm

THAT COULD MEAN FIRMWARE IS CORRUPTED. TRY RESETING IT.

If you have a card reader writer that accepts smart media cards then remove from keyboard and format via a computer.It may be fat16 and not fat32 ....a good utility is hp utility storage format tool which is a small file free to use off the internet.lastly because the card is so small you can get these for very little money off eBay.

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

Hi
I work with computers rather than musical instruments, but I imagine with all the things keyboards do these days they are almost certainly computerised, and your saying "tried to install os" confirms this.
In computers "SSD" stands for "Solid State Drive". If there is an SSD in the PA50, then it is quite clear to me that it is no longer working properly and needs to be replaced. Confirmed by the fact that you can't install the OS.
Hope this is helpful, if so would you please register that with Fixya
Cheers

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.

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.

Refer to your BR manual for procedure to format the card. Formatting the card in a PC just doesn't cut it.

Look in your index in the manual for "formatting" or "card"...etc.

If the disk had data put on with a PC you might try deleting all files and folders using the PC before formatting the disk in the BR8.

It is also possible that the media has gone bad.

A final try would be to degauss the disk and try to format on the BR8.

Sounds to me like something corrupted on the memory module. May want to try another compatible memory card.