SE/30 no internal SCSI

[Aaron707]

Hello all,

 I recently recapped an SE/30 motherboard. I cleaned the board with a toothbrush and soap and hot water, let it dry for a week or more and then replaced the capacitors. All the chips and traces look good on visual inspection. It boots and works fine, but the internal SCSI bus will not see a drive. I can connect an external SCSI drive and it can boot from the external but still not see the internal drive. I've tried a few different drives. Also, I suspected it may be power related so I replaced all the capacitors in the Sony power supply and recapped the analog board as well, no change. Any idea what would cause this? I have a Doug3 rom SIMM on the way to install so if I cannot figure this out its not a loss.

Thanks

 

[unity]

Can I assume you tried a different internal drive?

 

[Aaron707]

Yes I connected two different known good drives internally. An 80MB and 350MB. The drives are seen and will boot the system when I put them in an external SCSI enclosure and connect them. Is there a filter capacitor for the internal SCSI connector that may not be working?

 

[techknight]

Nope. Open traces.

 

[olePigeon]

I would double check polarity on your caps, and then just retouch all the solder points once more, make sure everything is good.

 

[uniserver]

that is funny your external port works.  but the internal one doesn't.    Techknight knows dead scsi traces oh so well.

 

[techknight]

External port traces run through the internal one first... except for one or two. I forget which.