Sega-Naomi

Hi All,

I've had a Naomi 1 mainboard die on me. I initially thought it was coz I wired up a case fan replacement (but this worked correctly on my new board. The power gets to the board, as the fans spin up, and I get the greed and red led lights. But no video out or sound. Where is the best place to start in trouble shooting?

Cheers

muggsy

when did it die?

werejag wrote:when did it die?

3 weeks ago perhaps... as I said. I thought the fan I set up shorted something so I bought a new mainboard. But the new mainboard works fine with my replacement fan. Everything on the board looks ok. There is a bit of physical damage to the battery holder (next to the bios chip) coz I must have used it as leverage to get the bios chip out at some point. Reseated the boards and everything looks pretty clean

maybe you damaged some bios traces

werejag wrote:maybe you damaged some bios traces

I'll have a look tonight. Should it come up with an error rather than nothing at all though?

you describe the problem exactly like what i experienced on one Naomi.



check the underside also of the bios

werejag wrote:you describe the problem exactly like what I experienced on one Naomi.



check the underside also of the bios

BIOS is good as I moved it to my replacement board . I've had a good look at the board and can't see any broken traces. The only damage is too the battery compartment. It's a shame because I don't know of anyone in New Zealand that could fix this (Out of my contacts)

ah no multimeter i take it. time to learn

werejag wrote:ah no multimeter I take it. time to learn

I have a multimeter.... only basic knowledge.. any hints as to where to start?

pin 11 to the nearest via