Hi Sven,
you have to place a new CR2032 on the mainboard, then do a CMOS default and set the correct date/time.
Normally, after that all should be OK. I had the same issue on mine, fixed it that way.
regards,
Jean-Luc
----- Mail original -----
De: "Sven Schnelle" <svens@...>
?:
[email protected]Envoyé: Mercredi 19 Mars 2025 17:34:35
Objet: [HP-Agilent-Keysight-equipment] E5071C powering down
Hi,
bought a E5071C 4-port 8.5GHz VNA. Seller stated that the device does
not power up. Arriving home I connected it to power switched it on - it
turns on, Fans blowing for 3-4 seconds, no other signs of life,
everything switching off.
Noticed that if i remove the CMOS battery from the Mainboard (a Radisys
Endura LS855 with Agilent patched BIOS), the Analyzer is starting up. It
boots Windows XP just fine and the VNA is working. (Luckily the RF ports
all seem to work).
When shutting down it won't shut down entirely, black screen, and the
Fans are still blowing. With the next power cycle i have the problem
stated above again, until i remove the CMOS battery again.
That even happens without booting Windows XP. So it seems like the BIOS
is loading some invalid values into the CMOS RAM.
The service guide from Keysight says it should be sent in to replace the
CMOS battery, but that's very expensive for a hobbyist.
Does anyone know how to get the proper CMOS data restored? I see there's
a bioscheck.exe binary in the E5071C folder, but executing that doesn't
change anything.
Thanks
Sven
