Mojo should detect the card even if all ICs except the FBI and the linear regulator are removed.
Most likely FBI has loose pins, that look ok but aren't actually soldered anymore. Other possible reasons, dead FBI (unlikely) or broken PCB traces/VIAs. Might also want to check that the voltage supplied by the regulator is around 3.5V.

Poke the FBI pins *gently* and see if any are loose.

Have a look at Jaton Voodoo 2 - 12MB not working [REPAIRED] for some tips and hints as to what to look for. sdz is 100% right, probably some loose legs.

Following, as I have one based on the same reference design, that behaves excactly the same way, except:

Mine does detect in Win98 and driver installs. I'm not sure if you have reported whether or not your card does that?

H3nrik V! wrote on 2025-09-21, 18:09:

Following, as I have one based on the same reference design, that behaves excactly the same way, except:

Mine does detect in Win98 and driver installs. I'm not sure if you have reported whether or not your card does that?

Mine doesn’t detect in Win98 either 😎

sdz wrote on 2025-09-20, 18:01:

Mojo should detect the card even if all ICs except the FBI and the linear regulator are removed.
Most likely FBI has loose pins, that look ok but aren't actually soldered anymore. Other possible reasons, dead FBI (unlikely) or broken PCB traces/VIAs. Might also want to check that the voltage supplied by the regulator is around 3.5V.

Poke the FBI pins *gently* and see if any are loose.

Thanks for the tip!

Checked the voltage regular. A very reliable 3.49V or 3.50V - so we’re looking good there.

I checked the FBI and there *is* one loose pin. It feels like I need to reflow the FBI chip? Any recommendations on the safest way to do that? (I don’t want to overheat and damage the FBI 😎)

Don't reflow it, just solder that one specific pin.

sdz wrote on 2025-09-21, 19:52:

Don't reflow it, just solder that one specific pin.

Thanks!

Just did a reflow with hot air on one of mine - actually ended up with more loose pins than it had before ... Sigh ... So yeah, follow the advice from sdz 😀

H3nrik V! wrote on Yesterday, 13:45:

Just did a reflow with hot air on one of mine - actually ended up with more loose pins than it had before ... Sigh ... So yeah, follow the advice from sdz 😀

🙃

Look also for such places (black circles on pictures), and scratch a little bit onto this traces (black lines) to see if there is continuity. This upper looks like a broken trace, but maybe it is ok. Try it....

butjer1010 wrote on Yesterday, 16:36:

Look also for such places (black circles on pictures), and scratch a little bit onto this traces (black lines) to see if there is continuity. This upper looks like a broken trace, but maybe it is ok. Try it....

Got spot! I tested the top trace and it is broken.

What’s your preferred way to fix?

jamesfmackenzie wrote on Yesterday, 16:45:

butjer1010 wrote on Yesterday, 16:36:

Look also for such places (black circles on pictures), and scratch a little bit onto this traces (black lines) to see if there is continuity. This upper looks like a broken trace, but maybe it is ok. Try it....

What’s your preferred way to fix?

usual way to fix is sand/scrape off the solder mask before and after the break (and inbetween).
tin the exposed trace. Small breaks the tinning might bridge the gap, if so skip to the new solder mask step.
if its to large or you want added support use a wire. clipped legs from resisters/capacitors are great for this. bend the wire (sometimes you can bend as you solder) to the shape of the trace and solder it to the top of the trace.
check for continuity and if good apply new solder mask (i just use nail polish)

I usually find it difficult to find room for a resistor lead. I'm those cases I use a single strand from a wire - sometimes 2, tightly twisted and tinned before placing them

jamesfmackenzie wrote on Yesterday, 16:45:

butjer1010 wrote on Yesterday, 16:36:

Look also for such places (black circles on pictures), and scratch a little bit onto this traces (black lines) to see if there is continuity. This upper looks like a broken trace, but maybe it is ok. Try it....

Got spot! I tested the top trace and it is broken.

What’s your preferred way to fix?

As Pickle said, if the gap is small, just scrape the trace near broken part (i use engraver to scrap, but You need to do that very carefully, very short time, or engraver can "scrape" whole trace in less than a second), and add flux and solder tin. If the gap is bigger, just use some kind of thin wire, and after scraping the trace, solder wire to bridge the broken part.
But i believe the most important thing with all Voodoo cards, is resoldering the pins on all 3 chips. I did fix at least 4 or 5 with this (although, none of them wasn't dead, they had smaller problems like no full memory shown or artifacts,...)

And also look if there is more spots like this one 😉

I had similar.

Check all the FBs.

They are ferrite beads, and basically only resist high frequency noise.
If they are open circuit, short it with a solder blob and retest.

One dead fb =dead card.

I think mine was fb2