Black Screen on Naomi Motherboard

OldFoo · Post by **OldFoo** » Mon May 05, 2008 9:26 pm

I have a Naomi 1 motherboard which powers up, and has both leds on, the fans (both) spin ok, but just get a black screen, doesnt post the naomi logo or anything, I have taken it apart, cleaned the fans and all clean, anything else I can do or is it now parts only?

Im using a CAPCOM IO board and have tried the same setup with another motherboard and works fine, so problem is within the mainboard

OldFoo · Post by **OldFoo** » Tue May 06, 2008 12:31 am

What is the game that you have loaded?

OldFoo · Post by **OldFoo** » Tue May 06, 2008 12:32 am

I have tried it with MvC2, Powerstone, Gunspike, and same on all of them, it has 21577 Bios? (Not rev.D or anything on label just the number) thanks

OldFoo · Post by **OldFoo** » Tue May 06, 2008 2:00 am

Check to see if your voltages are correct (12v, 5v, 3.3v). If they aren't, you need to boost your power output.

OldFoo · Post by **OldFoo** » Tue May 06, 2008 6:34 am

Try to swap the bios eproms of the two boards to check they're working.

Also check the power as mentioned above.

OldFoo · Post by **OldFoo** » Tue May 06, 2008 10:40 am

Everything is the same test setup, so the only part that changes is the main board, so I know power is good, and rest of setup is good, as have a working mainboard in it, I will try switching bios and see, thanks

OldFoo · Post by **OldFoo** » Tue May 06, 2008 11:10 am

well switched out the bios to a working one from the other mainboard, and still the same thing? fans spin up, leds work, monitor fires up but still a black screen, sounds like its terminal now

OldFoo · Post by **OldFoo** » Tue May 06, 2008 10:39 pm

You may be right about that. It's probably a goner. :smt009

OldFoo · Post by **OldFoo** » Wed May 07, 2008 3:03 am

englishman_in_plantcity wrote:well switched out the bios to a working one from the other mainboard, and still the same thing? fans spin up, leds work, monitor fires up but still a black screen, sounds like its terminal now

I've got a N2 MB with the exact same issue.

I was thinking about swapping out fans as geezer suggested.

OldFoo · Post by **OldFoo** » Wed May 07, 2008 10:44 am

I have replaced, switched fans and still the same problem, so that isnt my issue, its worth trying Bob just in case