Having problems with your Compaq AlphaServer DS10 ?

DS10L AlphaServer CPU Fan Failure

\015 Symtoms:\015\012System powers on but fails the self test and wont reach the SRM prompt.\015\012Event and FAN LEDs are lit\015\012\015\012Actions so far.\015\012Retrieved status from RMC with CPU Fan: FAIL indicated.\015\012\015\012Replaced CPU fan assembly with out any luck.\015\012\015\012I have o-scoped the leads from the CPU fan and I'm getting\015\01212VDC on the red wire.\015\0125VDC pulse on the yellow wire\015\012~0VDC on the blue wire\015\012\015\012I'm looking for any further trouble shooting ideas.\015

Answers :

The answer is to get hold of a high-speed case fan. I used a Scythe s-flex 80mm which has a +/- 5% RPM of 2800. rearrange the pins or use a choc-block such that yellow -> black, red -> yellow, black -> red. Hey presto.
\015\012Works for me.
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