Question about Compaq AlphaServer DS10

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DS10L AlphaServer CPU Fan Failure

Symtoms:
System powers on but fails the self test and wont reach the SRM prompt.
Event and FAN LEDs are lit

Actions so far.
Retrieved status from RMC with CPU Fan: FAIL indicated.

Replaced CPU fan assembly with out any luck.

I have o-scoped the leads from the CPU fan and I'm getting
12VDC on the red wire.
5VDC pulse on the yellow wire
~0VDC on the blue wire

I'm looking for any further trouble shooting ideas.

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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.
Works for me.

Posted on Jul 04, 2010

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Posted on Jan 02, 2017

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The ProLiant DL380 G3 server requires that both primary and redundant fans exist in a specific configuration in order to perform optimally. Any deviation from the specified configuration will cause one of the above error messages to occur and the internal Health LED to illuminate. In a ProLiant DL380 G3 server without the redundant fan option, the server will shut down after the error message is displayed. In a server with the redundant fan option, the internal Health LED will illuminate and the appropriate error message regarding fan redundancy will be displayed. The purpose of this document is to detail the required configuration for both primary and redundant fans.
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Figure 1: ProLiant DL380 G3 server configured with all eight fans installed for fan redundancy
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