I have a problem with Korg pa2x pro not boot

musiccankill · Post by **musiccankill** » Fri Jan 18, 2019 12:52 am

It does exactly the same as formatting through service menu.Except that from service menu you can check the condition of the nand too!
Pa800 and pa2x have 2 memories inside
A NOR one which contains the bootloader (can't be formatted by user as nobody has the bin file (except if you dump it alone)) and a NAND that is used as a simple sd card (not same protocol but just to compare it to something most users are familiar with)..
When you format the NAND you actually delete all its contents for the new OS to be installed in..
That doesn't clear the bad sectors..If the sectors are bad it is a hardware fault not a software one and unfortunately there is nothing to do except from changing NAND...
There is a way to try to recover bad sectors in case of them got false triggered by the system but a flash programmer is needed as long as skills to desolder and resolder the chip...

joly_dm · Post by **joly_dm** » Fri Jan 18, 2019 6:38 pm

dear musiccankill and siebenhirter thank you for your effort
I changed the chip u29 today. When checking ok bad blocks (0) good chip now
But the problem is still. Nothing happens...

musiccankill · Post by **musiccankill** » Sun Jan 20, 2019 7:01 pm

Well if changing the chip didn't fix it there are a lot of other things that could be wrong with it...
I advice you to download the service manual and check everything