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Author Topic: Tech: Installed FPU in E-matrix and A1200 no longer boots  (Read 2437 times)

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Offline wolfchild

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Re: Tech: Installed FPU in E-matrix and A1200 no longer boots
« on: November 22, 2008, 06:46:54 PM »
Quote
Not sure if I have the exact value needed for the surface mounted diode above and to the right of the FPU's crystal, but I tried 3 and they all produced the same results.


The part you have fitted is a Tantalum capacitor (10uF, 25V) and not a diode.

Are you sure what the original part shown on the BBOAH picture really is?  I mean, is it a diode or a Tantalum cap?  You might want to double check what should go there and not to power up with that capacitor in place until you're sure.

Be warned that Tantalum caps very often fail explosively and without warning if they have a wrong polarity voltage applied to them.  If indeed a diode was supposed to be there, then that Tantalum cap is getting a reverse voltage and is very likely to end up in fireworks if you power up that board for any length of time.

I hope you do get it working soon!  You seem to be pretty close, but be careful about the component values.

Good luck!
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