Broken Mac Accelerator

[Teo Zenios]

My latest acquisition came in today, a Mac IIci, that I wanted to use as an OS 6.08 machine with a Daystar Turbo 040 (68040/33) accelerator. Anyway after cleaning up the system and installing the OS I put the card in and loaded the drivers and all was fine (very fast booting). After about 15 minutes I had to reboot for driver update and the system would just bomb during boot (about where the control panel for the Daystar card would want to load). I took the card out and notice there was a capacitor missing on the back with a nasty looking black burn mark. So I started looking around inside for the burn metal part and notice I did not smell or see smoke or little capacitor parts (its a surface mount with no numbers on it). Doing a little digging in my picture archive I verified that the card which I have never used before (which is why I wanted a IIci since it works in that model) was sent to me in this condition.

So what I want to know is how the thing functioned at all without the cap (burnt carbon acted as a capacitor in some way)? and what caused it to stop working.

If anybody have an original Daystar Turbo 040 33Mhz card with the cache on a separate board could you let me know (if possible) what value C54 s supposed to be? The cap looks to be tied into one or two legs of the oscillator chip that controls the CPU (Ecliptek EC1100 16.667Mhz 93-10).

I kind of want this working again since it will be a long time before I find another one at a great price.

Thanks

TZ