NAOMI WSB '01 GD-ROM Error 22 -- how do YOU handle this?

mecha

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NAOMI WSB '01 GD-ROM Error 22 -- how do YOU handle this?

this particularly goes out to the channelmanics (or channelmaniacs, was that a typo on KLOV or what?) out there

World Series Baseball '01 GD-ROM started with the Error 22 shit on and off until this week, it happened to do it every day upon initial power up. this is the evil "COMMUNICATION ERROR OCCURRED BETWEEN MAIN BOARD AND OPTION BOARD." error.

after tinkering with the SCSI cable, a reboot would normally make it work.

the direction that most everyone is hinting at on various message boards is that the DIMM board may have failed. so, here's a checklist of things I've attempted already:

power supply voltages: were 5.12 and 3.45 (!!) -- now set to 5.10 and 3.30

cleansing: it needed it. I stripped down every component, including the GD-ROM drive, and blasted the nasty black dirt out. so, we're clean. I even wiped down the mounting board. the GD-ROM disc was cleaned as well.

connections: all cabling was fine. I swapped the SCSI cable from our working Virtua Tennis and same Error 22 came up.

seating: I pulled the DIMM board, disassembled it, reseated the communication board (I'm assuming that's what it's called, with the SCSI connector) and reseated the boot rom. the DIMM board was reinserted firmly into the main board and screws tightened again.

main board: I switched the DIMM board over to a NAOMI 2 board I had laying around (goes well together with everything being the same color:)) and the same thing happened.

I'm at a loss for what else to try, next to pulling the DIMM board from Tennis to verify if it's a main board issue or the DIMM board... but then again, Tennis drew the same error from time to time, and I don't need 2 dead games. :)
 
There are reports on the sega-naomi forums of that being caused by a bad DIMM board, older Rev A of the I/O board, or bad connections to the I/O board.

Have you run the self tests on the system to make sure all the RAMs are good?

Also, have you reseated the DIMMs and the DIMM board?
 
I did reseat the DIMMs, yes. however one point I forgot to mention... the battery inside it is dead, and I removed it. does the connector on it work the same way the CPU fan does where if it's not connected, the board won't power up? (even if the battery is dead)

I tried doing the DIMM Board Test anyway and it just sat at 0%. you know, like it's not even powered up. :)

could it be something that simple and stupid? I'll try dropping the battery back in tomorrow, see if that makes a difference.

EDIT: despite the battery having a small PCB that handles the charging shit, it has nothing to do with the function of the rest of the DIMM board (it would be the same as how it was where it just loads the game every time). fuck.
 
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It's possible the buffer chips on the DIMM board are dead. They are pretty dang voltage sensitive.
 
+5 wasn't too bad. I've never done any maintenance on these the last couple years (my fault) because they always worked very well.

then again, they're like 10 years old, so who knows.

well, it's been shoehorned into a storage garage now, so doesn't look like I'll be playing with it for awhile. lol
 
well, figured I'll post the resolution here.

I gave the whole machine an extensive cleaning. upon reinstalling and reconnecting everything, the Error 22 persisted. so we pulled the game off the floor. out of dumb curiosity, I swapped the "bad" DIMM board into our Virtua Tennis, which still worked, and the DIMM board worked perfectly fine. this, after I won a DIMM board on ebay. (wasn't my money :D:D:D) I then took the Tennis DIMM board and put it with the WSB main board, and it booted as well.

so I left the two games in their swapped configurations.

I'd taken the GD-ROM apart on WSB, cause it was clogged with dust, just like everything else. reassembly was a nuisance, because for some reason I reinstalled the fan bracket backwards. the plastic cover didn't line up correctly as a result, and the disc would not spin freely, it would rub against the plastic. this yielded an Error 25 Can Not Access GD-ROM (or whatever)

potential causes for that are swapping the +5 and +12... not sure how you do that, considering the power plug only fits one way. of course if you do happen to do this, you fry the electronics. well, I took the disc out completely and ran it with the cover open and got a response, the GD-ROM Cover Open error, so with that I assumed that the drive and cabling were all fine.

so after placing the fan bracket on right, after taking this drive apart 20 times, it closed properly, and guess what... it worked.

so, see, clean game, and I technically didn't have to put any money into it to fix it.

now we can listen to the attract mode all day again, until someone feels the need to play it.
 
It's possible the buffer chips on the DIMM board are dead. They are pretty dang voltage sensitive.

which chips on the dimm board are buffers?

today i found the same error 22 in wild riders (also naomi 2 system), and fix it by replace buffer chip on it's rom board (2x lcx373). then i remember that i had a broken initial D board with same error too. i opened it up, but i don't see the same buffer chips. i confused.
 
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