Anyone know about an HP 8904A - help reqested....

[Mike Deblis]

Hi, I'm rebuilding a rather sick HP 8904A, which had been nastily damaged by
previous repair attempts (not by me).

I've managed to get the base machine up and running again by replacing the
firmware EPROM that had a broken pin, and have replaced the battery to the
CMOS RAM so that the machine at least starts up (used the hack on the
Agilent site to re-init the RAM) and passes basic self-tests - other bits
needed fixing too...

Now I want to re-install the firmware - 2 labels on the chassis have been
partly peeled off, so are not complete... I know these contained code-words
linked to the serial number of the particular machine and the specific
option number. There are some numbers written in the manual - 6 digits -
which may or may not be what I'm after - they don't seem to work when I
enter them as firmware codes.

Could someone with an HP 8904A with options 1 and/or 3 & 5 let me know at
least the format of these code words so I know what I'm after- this machine
used to have opts 1 & 3 (opt 2 is a physical board and is present and seems
to work). HP do not support the machine any more, and anyway, I couldn't
afford to send it back to them for fixing - besides, I'm almost enjoying
this (not!).

Any help would be appreciated.

Thanks

 

[Mike Deblis]

"Mike Deblis" <mdeblis@hotmail.com> wrote in message
news:%5udc.31285$Y%6.3877706@wards.force9.net...

Hi, I'm rebuilding a rather sick HP 8904A, which had been nastily damaged
by
previous repair attempts (not by me).

I've managed to get the base machine up and running again by replacing the
firmware EPROM that had a broken pin, and have replaced the battery to the
CMOS RAM so that the machine at least starts up (used the hack on the
Agilent site to re-init the RAM) and passes basic self-tests - other bits
needed fixing too...

Now I want to re-install the firmware - 2 labels on the chassis have been
partly peeled off, so are not complete... I know these contained
code-words
linked to the serial number of the particular machine and the specific
option number. There are some numbers written in the manual - 6 digits -
which may or may not be what I'm after - they don't seem to work when I
enter them as firmware codes.

Could someone with an HP 8904A with options 1 and/or 3 & 5 let me know at
least the format of these code words so I know what I'm after- this
machine
used to have opts 1 & 3 (opt 2 is a physical board and is present and
seems
to work). HP do not support the machine any more, and anyway, I couldn't
afford to send it back to them for fixing - besides, I'm almost enjoying
this (not!).

Any help would be appreciated.

I'm still hoping someone will be able to help on this - I copied the EPROM
(its equivalent to a 27C010) so the machine is baiscally back on-air... I
would like some help on why the options aren't enabled...

Thanks

Mike