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| Mac IIsi won't startup with Mac CON 30ie installed |
Posted by: joethezombie on 2016-08-29 21:03:15
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?
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Posted by: TheWhiteFalcon on 2016-08-29 21:13:46
Clicking to me sounds like too much power. Those IIsi PSU's are supposed to be pretty picky IIRC.
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Posted by: joethezombie on 2016-08-30 17:40:45
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.
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Posted by: joethezombie on 2016-08-30 18:40:24
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. :-/
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Posted by: Elfen on 2016-08-30 19:05:43
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!"
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Posted by: joethezombie on 2016-08-30 19:56:58
I'm sorry, should have been more clear. On the 30ie. I pulled the capacitor and it is shorted.
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Posted by: techknight on 2016-09-02 16:24:16
yea those caps being shorted will hold up the rail.
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