Re: Ultra 60 NVRAM

[Michael <macallan%netbsd.org@localhost>]

Hello,

On Thu, 30 Nov 2017 15:06:25 +0000
Jaap Boender <jaapb%kerguelen.org@localhost> wrote:

> Not strictly a NetBSD question, but I imagine someone here must know the 
> answer to this...
> 
> Trying to revive my Ultra 60 for NetBSD purposes, I found that the NVRAM 
> battery had died.
> 
> I ordered a M48T59Y-70PC1 chip to replace it with, but after I changed 
> it the machine refuses to boot (even the power LED doesn't come on).
> 
> The new chip is a -70PC1D rather than a -70PC1U. I don't think I've 
> fried anything - the machine still boots fine with the old NVRAM chip.
> 
> So, is the D rather than U significant? Is the chip just defective? 
> Should I do something to reset the NVRAM? (I tried Stop-N at boot, but 
> that doesn't seem to have any effect)
> 
> any light shed on this appreciated,

Did you by any chance stick the chip in the socket the wrong way
around? I've seen timekeeper chips with misleading or missing
orientation / pin one indication and fried one myself that way...
The symptom(s) would be the chip being dead and the machine probably
not booting.

have fun
Michael