[rescue] Starting a Sun E450

Alan Perry alanp at snowmoose.com
Thu Nov 6 20:15:07 UTC 2025


As noted in another post, one of the tabs that presses the interlock switch down was broken.

My arm is now getting sore holding the switch down for the last 5 minutes and still nothing on the serial console.

> On Nov 6, 2025, at 11:33, Mouse via rescue <rescue at sunhelp.org> wrote:
> 
> 
>> 
>>>> Do you mean no fans start up?  [...]
>>> No fans.  [...]
>> Oh lol let me guess ... you have the case opened up wide?
> 
>> There's a case switch, if the case isn't closed up it won't boot up.
> 
> In general, be careful bypassing those.  Depending on the system, they
> are sometimes there for good reason.  Some cases are designed for
> airflow assuming a closed case; if you defeat the interlock and run
> them with the case open, you may get insufficient airflow past some
> pieces to keep them sufficiently cool.
> 
> I don't know whether the E450 is an example.  Just feel I should at
> least raise the possibility.
> 
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