If The Firmware Doesn't Appear To Be Updated; If There Is A Power Failure During A Firmware Update - HP E3494A Installation And Service Manual

Updating Firmware

If the firmware doesn't appear to be updated

If the firmware doesn't appear to be updated
Though Flash EPROM is very reliable, it can fail. If the HP processor probe
determines the Flash EPROM is not working, it will try to use the boot code
in its Flash EPROMs. The only useful operation the boot code allows is
running prgflash.
Make sure the current version information is correct by comparing it
with the version numbers of the update software.
Try updating the firmware again.
If none of these steps solves the problem, contact your local HP
Representative.

If there is a power failure during a firmware update

If there is a power glitch during a firmware update, some bits may be lost
during the download process, possibly resulting in an HP processor probe
that will not boot up.
Set switch S4 to OPEN, then cycle power. This tells the HP processor
probe to ignore everything in the Flash EPROM except the boot code.
Repeat the firmware update process.
Set switch S4 to CLOSED, then cycle power. This restores the
HP processor probe to its normal mode.
74