Checksum Errors on my Simpson Party Pinball.

I recently started getting a CheckSum $F0FF errors when I power on my TSPP.

I thought it was a bad CPU ROM so I bought a new one from Marcos and installed it, same error message.

I thought it might be the Display ROM so I swapped out the CPU ROM v5 and Display ROM v5 with my 4.0 versions and I get a CheckSum $4FF (CPU 4.0 ROM) So I am pretty sure it is not the CPU ROM or Display ROM. Thoughts?

Looking for ideas where to start.

Thanks in advance, be Well!

Thanks for replying. I should have clarified.

V5 CPU ROM shows a $F0FF Checksum error on boot
V4 CPU ROM shows a $4FFF Checksum error on boot

I have a LOTR with the same board. So i moved the LOTR board into the Simpson and I still get the checksum errors. The Simpson board plays fine in the LOTR (Of course when I move the boards I switch the chips)

So I am pretty sure it is not the board itself, and I have 2 sets of ROMs I have tried both with checksum errors so I am assuming that it is not the ROMs themselves. I actually have 2 sets of V5 ROMs because I originally thought it was a issue with the CPU V5 ROM so I bought a new one.

I am perplexed to what else could be causing this. I am new at this so still in learning mode

Thoughts?

rob

Resolution:

Error was the pinball owner (aka..me)

There was no error at all on the pinball game. I had done a factory reset, and quick boot was set to "no"

Which looks like it does a test, and post the checksum. I figured it was a error and it was just a informational message.

Sincerest thanks to all of those who jumped in to help. I have so much to learn

Now I am going to slink away and pretend I am smarter then I am!

rob