Mac IIsi won't startup with Mac CON 30ie installed

[joethezombie]

So I acquired a Mac CON 30ie, but when I install it in my IIsi, the IIsi won't start up anymore.  Instead I get a very low audible clicking noise from the power supply area.

The card looks absolutely pristine.  Anything I can try to get it working?

I did verify the PDS slot with a video card, which worked great.

I'm going to check all the resistors, but the caps are all ceramic and look brand new.

I haven't yet recapped the PS on the IIsi.  Could the ethernet card be trying to pull too much power?  Seems like the video card would be more demanding.

Suggestions?

 

[TheWhiteFalcon]

Clicking to me sounds like too much power. Those IIsi PSU's are supposed to be pretty picky IIRC. 

 

[joethezombie]

Hmm... I'm going to get to the IIsi power supply eventually.  But I couldn't wait and tried the card in the SE/30 which I have recapped the power supply, and I get the same clicking.  I guess this ethernet board is dead.  I'm sad.

 

[joethezombie]

Update, so I found a short at C7, even though the capacitor has no visual anomaly.  Going to need a 22μ 16V tantalum pearl.  I wonder what the chances are something else on the board is fried.   :-/

 

[Elfen]

C7 where? IIsi Logic Board? Mac Con 30ie Card? Powersupply?

Make sure that it is a non-polarized Tantalum Cap or as Scotty would say , "That's too much power! She's gonna blow!"

 

[joethezombie]

I'm sorry, should have been more clear.  On the 30ie.  I pulled the capacitor and it is shorted.

 

[techknight]

yea those caps being shorted will hold up the rail.