Fried Naomi2. Worth to try to repair?

[buffi]

Got a dead Naomi2 for free with some other stuff that apprently has been fed 12v on the 5v line due to some mistake.

Does not boot, and motherboard has no visible issues. Fans spin up fine.

Any idea if its worth trying to figure out which parts are dead? If so, where should I begin...

 

[AMS]

Replace the filter board with a Naomi 1/2 just to begin with . Maybe a trace burned.

 

[buffi]

Replace the filter board with a Naomi 1/2 just to begin with . Maybe a trace burned.

Good idea!
I'll try that right away.

 

[buffi]

That didn't help :/

 

[nam9]

Isn't it the Ram that is susceptible to dying at high voltages?
Is it just the motherboard you are booting? Any changes to the BIOS?

 

[buffi]

Isn't it the Ram that is susceptible to dying at high voltages?
Is it just the motherboard you are booting? Any changes to the BIOS?

Yes just motherboard for now.
No idea which BIOS is in it right now. Might try replacing it with a new one (it's a EPROM so must be something custom at least).

 

[AMS]

@buffi 1 or 2 Mains RAM (IC106 and IC107) are dead they don’t take over voltage more then 5.1-5.2 I read

 

[buffi]

Alright, I'll try to figure out which chips those are and will swap them at some point.

 

[nam9]

N1 or N2
- Does not exceed 5.1V, the buffer chips do not support more, then even if it is less than $1, better to avoid changing by pure luck! Rams aren't supporting more voltage too.

And buffer chips (no idea what I'm talking about, but there are people who do!)