[rescue] Help me rescue my Sun Ultra 10 (2x)

[HP van Braam]

Hello!

Thanks for everyone's help so far. I bought one replacement NVME chip
and after a rather nailbiting first power-on that didn't seem to do
anything... The second boot everything seems to work perfectly.

I replaced the chip with a M48T58Y-70PC1 and it works! I bought another
one to see if it will save the other Ultra 10 as well.

Thanks a lot!

- HP

On Tue, 2025-12-09 at 20:18 +0000, HP van Braam wrote:
> Hello!
> 
> I have two Sun Ultra 10s with the same fault, and they came to get
> the same fault in the same way.
> 
> They both did the following:
> 
> * Started to get IDProm errors
> * Used the "normal" instructions for fixing this
> * Some time later after a reboot things started to go wrong
> 
> This sort of worked for a moment, but now when I apply power to
> either machine the power led stays off (most of the time) in the very
> rares time when the power led does turn on I can't succesfully boot
> the machines. Sometimes they end up booting into Solaris but they are
> not stable.
> 
> For instance even dtlogin will just start and cycle on and off until
> ultimately the system hangs entirely. At this point pressing stop+a
> and resetting usually doesn't boot correctly.
> 
> Swapping around ram/CPUs/power supplies between the two systems has
> no effect. Removing the AFB doesn't really seem to change anything
> either.
> 
> It seems kind of unlikely that both computers have the same obscure
> hardware fault in the same component, I hope this is all just the
> IDProm fucking up.
> 
> I tried both of the IDProm chips in my minipro reader and they seem
> to not really read that same each time. And writing data to the chips
> doesn't seem to "stick".
> 
> Help would be very much appreciated! Thank you! 
> 
> - HP