E250 problem: fan failure has been detected (at ok prompt, and boot up)

From: Tony Magtalas (ttk67@yahoo.com)
Date: Tue Mar 16 2004 - 11:41:07 EST

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Configuration:

E250 with OBP=3.31 (latest); Solaris 2.7; loaded
system with 2 cpu and 2 GB of memory. Dual power
supply.
Both at OK prompt level and during boot up, this
system
gave the following warning message:

WARNING: Fan failure has been detected.

(yes, this message also was detected at boot prompt
level)

I have replaced the fan tray (with 3 fans); the
system board, and the power supplies with no luck.

The system boots up OK, however.
"prtdiag -v" shows no failure in the system, however,
it also shows the following line:

  Fan Bank :
  ----------

  Bank Speed Status
           (0-255)
  ---- ----- ------
   SYS 163 FAILED

How can the system shows no problem but the fan bank
showed a failed status?

I already swapped 2 fan trays as well.

Any idea what is causing the problem?

Thanks in advance,

Tony
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