MTH PS2/3 Processor Scrambled

Absolutely, putting the wrong chain files or a bad flash could brick (scramble) a board set. It might not be recoverable, we are warned of this risk when flashing boards. It's a risk and chance we take each and every time we do it.

That's why all over the package in upgrade kits, there are warnings on the board anti-static bag. Once you open that and play the game of mess around and find out--------sadly you found out.

I actually haven't heard of a software load scrambling a PS/2 board.  I have seen them scrambled to the point they had to go back to MTH for them to use their development system to reload the boot code, that can result from a bad sound file.  This happens more with PS/3 files, I've seen several incidents where more than one board had to go back to MTH as a result of a bad chain file.

There is no way to "scramble the processor", it's the FLASH boot code that would be scrambled.

Would both PS2 boards be bad? I would think that maybe the power board would be OK if this  was from a PS2 upgrade set.  3V

Yes, there's nothing on the power board that is programmable.  OTOH, the processor board is usually the one that croaks, I have power boards left over from the PS/2 days...

Either way, the OP seems to doubt what they have been told. I realize the sticker shock cost of the mistake, but it doesn't really change anything.

MTH may no longer have the previous way of flashing certain boards since the downsizing and sell off of much older equipment (this appears to be stating it's a PS2 upgrade kit, which likely would be a PS2 3V board set) or maybe this specific board just would no longer reprogram, and yes, that's now true, MTH no longer has the replacement "PS2 3V processor boards" only the upper "power board". I get the feeling "lost in translation" from MTH to customer- Processor or processor board is just wording.

An upgrade kit was user installed. Mistakes happened. They sent it to MTH who said we can no longer repair or replace that directly (PS2 3V).

The "fix" is a new PS3/2 Stacker board set with PS2 3V style connectors to match the existing wiring harness.

AE10000353V          https://www.mthpartsandsales.com/

Quite truthfully, I think MTH just can't be bothered.  To be fair, they're not exactly over-staffed, so I suspect they're plate is full.

Thank you for all of your responses.

I was just a little surprised that the parts are not available for what I thought was a newer product.

I may look into a new board when funds are available. For now, I'll just put the PS1 bsystem back in so I can run the locomotive.