[rescue] Starting a Sun E450

[Stephen Conley]

One thing I'm remembering from E450 boot is that it goes into Jet Engine 
mode pretty early on.  The fans should be going full speed and I think 
they stay on until the OS takes over and steps them down based on actual 
tempurature conditions.

If the fans aren't roaring that's probably diagnostically relevant.

On 11/6/25 13:11, Alan Perry via rescue wrote:
> Null modem cable setup. Using a USB serial adapter and the Serial app 
> on a Mac, same setup I use with my other Sun boxes.
>
> Should the front panel peripherals immediately have power when the 
> rear switch is on? The CD eject button doesn’t respond.
>
> Should there be serial console output during POST?
>
> alan
>
>> On Nov 6, 2025, at 09:58, Jonathan Katz via rescue 
>> <rescue at sunhelp.org> wrote:
>>
>> 
>> They can take a while to POST. Null modem cable and all that good 
>> stuff hooked up?
>>
>> -Jon
>> +44 7792 149029
>>
>>
>> On Thu, 6 Nov 2025 at 17:50, Alan Perry via rescue 
>> <rescue at sunhelp.org> wrote:
>>
>>     Hi,
>>
>>     I am trying to get the E450 that I mentioned previously running.
>>     It was running in the data center at work until it was
>>     decommissioned a couple months ago.
>>
>>     I collect and rescue sun3 desksides and sun4c and sun4m
>>     workstations but have no experience with the E450.
>>
>>     When I turn on the power switch on the back, both power supplies
>>     show green LEDs but nothing happens as I turn the front panel
>>     switch key through the different positions. It has a frame buffer
>>     (PGX32) but I am using the serial console. Nothing appears there.
>>
>>     Any suggestions?
>>
>>     alan
>>
>>
>>     _______________________________________________
>>     rescue list - http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org
>>
>> _______________________________________________
>> rescue list - http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org
>
> _______________________________________________
> rescue list -http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sunhelp.org/pipermail/rescue_sunhelp.org/attachments/20251106/d6c6ef70/attachment-0001.html>