On Sun, 23 Aug 2015 23:04:46 -0700
Paul Rogers <[email protected]> wrote:

> Eventually I went under the covers and did a hard CMOS reset,
> and it magically reapeared.

Although in many/most "modern" computers the BIOS NVRAM actually is in
flash, perhaps that machine uses/requires the CMOS battery to maintain
the BIOS settings. If the CMOS battery is getting weak, then errors can
start to occur in the BIOS settings. If that battery is more than 5
years old (and maybe regardless of its age), I'd go ahead and replace it.

I've always thought it was an oversight for BIOS makers not to have
standarized a way to export/import the BIOS settings (via serial port,
to DOS floppy, or even as ascii printer text through the parallel port)
from the earliest days, well, at least after the number of settings
exceeded a dozen.


  Cheers,

  Mike Shell
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