[rescue] Sun E450 - 'CPU Fan 2 Failure' but not failed

Peter Stokes peter at ashlyn.co.uk
Mon Nov 11 03:07:04 CST 2013

Hi Greg

Glad it was nothing too difficult to change if you wanted to, those chips
should be available fairly easily I guess or at least an equivalent.


> On 11 Nov 2013, at 03:49, Greg Jurman <jurman.greg at gmail.com> wrote:
> So, a successful update.
> I disconnected and removed the main-board from the chassis and send a
> 1V at 1Khz square-wave through the rotor locked/alarm lines one at a
> time. This allowed me to trace where the signal is going. They land at
> a 74ACT04 Hex Inverter (its U4401 or U4601, I cant read the second
> digit, silk-screen is too blurry) just below the DC-DC converters
> (DC-B2 to be exact). One of the paths is a dead-open, and that is the
> signal path for Fan 2.
> I soldered a small bodge-wire between one of the working outputs and
> the dead output temporarily to confirm that this is in-fact the
> problem. I no longer have the Fan 2 failure.
> Going to try Solaris again and give it a burn-in to make sure nothing
> else is wrong with it.
> So it was a board problem, at least it not with one of the actual ASICs!
> Greg
>> On Sun, Nov 10, 2013 at 12:33 PM, Cory Smelosky <b4 at gewt.net> wrote:
>> Sent from my iPhone
>> On 10 Nov 2013, at 03:43, "Meelis Roos" <mroos at linux.ee> wrote:
>>>> Speaking of firmware for older Sun gear, anyone have the latest OBP for
>>>> Ultra 60 laying around?
>>> I downloaded all the PROMs before Sun was swallowed so I certainly have
>>> them somewhere...
>>> Is 106455-11  the one you are looking for?
>> I think so, yes.
>>> --
>>> Meelis Roos (mroos at linux.ee)
>>> _______________________________________________
>>> rescue list - http://www.sunhelp.org/mailman/listinfo/rescue
>> _______________________________________________
>> rescue list - http://www.sunhelp.org/mailman/listinfo/rescue
> _______________________________________________
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