Model 3 video board error

ratsflif

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Any Sega Model 3 gurus around here.

One of my Sega Super GT twins started giving a video error on startup and will not boot past it.

Error: (1A) Video Board Abnormal Status

It worked fine last weekend. I pulled the board stack out and it was filthy. I pulled the stack apart, cleaned all the boards, made sure all the roms were seated and re-assembled but I'm still receiving that same error. I plan on swapping boards between my working and nonworking side to narrow down the problem but thought I would ask here first.

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Thanks
 
I have daytona 2's, I believe the connection between the boards are probably not connected. Pull them apart again and make sure the connect all three board levels are fully connected. Also look to see if any loose or pinched wire.
 
I have daytona 2's, I believe the connection between the boards are probably not connected. Pull them apart again and make sure the connect all three board levels are fully connected. Also look to see if any loose or pinched wire.

Thanks for the reply. It's definitely not a board connection issue. The game started giving this error before anything was messed with. I completely disassembled the board stack, cleaned all the boards and connectors, reassembled everything making sure all the connections were tight and then booted it back up to the same exact error message.

I just swapped the entire cage into the working side and it gives the same error so it's not cabinet wiring.
 
Maybe the board blew? I just had servo board blow while testing a drive board just two days ago on one of my daytona's. So it is not out of the realm of possibility. Model 3 GPU's come up quite often on eBay, you could always buy a cheap model 3 game in cage and rip the GPU out.
 
Yeah, that's what I'm thinking. When I get some time I'm going to swap the video boards between my working/nonworking and see if the problem follows.
 
Its just a generic error that tells you something crashed system. Could be leaky super cap on CPU bd corroded pcb, could be bad QFP RAM over by CPU on CPU Bd. Could be bad stack connectors between pcbs. Swap pcbs to confirm and I can direct you closer.
 
So it's been awhile. Finally revisited this. Now my working side is giving the same video board error...

I tried swapping every board combination between the two sets and I receive the same error message no matter what. Might try to find a working model 3 step 1.5 video board to see if that gets it going.
 
So it's been awhile. Finally revisited this. Now my working side is giving the same video board error...

I tried swapping every board combination between the two sets and I receive the same error message no matter what. Might try to find a working model 3 step 1.5 video board to see if that gets it going.

Before or after you started swapping boards?

Did you tried grounding out the super cap? (Short it to remove the charge, all saved settings will be lost.)
 
Before or after you started swapping boards?

Did you tried grounding out the super cap? (Short it to remove the charge, all saved settings will be lost.)

My working side just suddenly stopped working a few months ago with the same video board error message. I just hadnt had time to troubleshoot.

So both boards give the video error before any swapping happened.

No I have not tried grounding out the super cap. Where on the cpu board is that one? I did try removing the battery.
 
Super cap wont kill set like this. Shorting only helps if data gets corrupted. Like Daytona, the corrupted data will only change viewpoints to places graphics are not written.
 
Here is a pick of the lights on the cpu board, I couldnt find any info on what the correct light pattern should be.

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There is no pattern. They just indicate CPU is running. If these lock on and stop flashing, it just means CPU has crashed for whatever reason. You really need to get a good set introduces here to find which pcb in stack is causing issue.
 
I picked up a full Virtua Striker 2 boardset from ebay last night. I'll do some testing when it comes in and hopefully narrow down the problem boards.
 
I received my Virtua Striker boards from China today. So hopefully I'll have something running this evening.
 
So it looks like both the video boards are the problem. I swapped the video board from the Virtua Striker I just received onto each of my Super GT board stacks and they fired right up.

Is there anything I can do to keep this video board running? Add heatsinks to the video processors, add more fans?
 
Well that was short lived. Game worked for less than a month and now gives the same video board error. Third video board this thing has eaten.
 
Personally, I'd send 1 video board to Ken (he replied above several times) at irepairsega.com and he'll let you know if the board had bad ram, fix it for you, and send it back.

Then run that board for awhile and if everything is fine, send the others out to repair.
 
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Sega Model 3

All Model 3 cages came with dual fans on sides of cages. They were mainly to keep the Power PC processor cool on CPU Bd. Its rare to ever get heat damage to Video Bd. And other pcbs in stack will not cause damage to Video Bds. Ok unless the CPU bd had wacked stack connectors and mangled the mating connector on Video Bds but that really never happens. What will take out pcbs is voltage. You should have 5.10 and 3.30vdc at CN13 of Flt Bd on cage. If so and power is stable, you just got a bad Video Bd. I have fixed hundreds... ok maybe closer to a thousand Video Bds on Model 3 so it should be no biggie to fix. Also, its rare for a Video Bd to die. It more usually will have graphics issues and show bad RAM or boundary errors. You can send any of these in if you like.
 
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