Electronics > Repair
Agilent 34461A corrupted flash
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coromonadalix:
windows ce tools
Eng_tech:
I've used it to create a USB drive containing the firmware that the meter orginally had. Of course the USB on the front panel does not work so it can't be used for updating firmware. YModem is only choice that works at this point. The log generated from dumprom is nice as it shows where each file is located and its length. Of what help that will at this point I don't know. I just wanted to see the files thats contained in nb.nb0.
coromonadalix:
the worst  would be some both  spear problems and nand corruption ??       dang



but the keysight fw  talk about creating the build.xml file and the Nk.bin   and put them on the usb key ???

attached
Neganur:
managed to fix a white screen / no boot error on an 34465A by swapping the Spear (U201).

As received, unit did power up, but no fan/USB/LAN, white display.
Upon initial optical inspection of the front panel module, I saw that the Spear had shorted solder balls, and the power management IC (TPS650701) got very hot.
Replaced the Spear, short circuits were gone. Unit powered on, fan spun up. B/W Keysight logo on the display with a progress bar running, but halting.
Two reboots and the progress bar made it to 100%, device seems to power up normally and functions.

Last instrument error displayed is "+822 Controller and measurement board serial numbers do not match", which went away after a factory reset (Edit: seems to persist, error queue was just emptied).

The Spear is quite warm to the touch, I think I am going to place one of those sticky heat sinks on it.

Is it worthwhile dumping the EEPROM?
coromonadalix:
@neganur,  if you can do a dump and post it,  sure it would maybe help others ??

the best would be having nand dumps and others things like a "good booting"  log file

the FW is good for the 34461 34465 and 34470 meters ?
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