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Agilent MSO-X 3014A not booting past Ref/Math/Digital/Serial LEDs

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elemenoh:
This scope is new to me and not booting. Before digging in too far, I'm hoping someone here might know where I should focus troubleshooting.

This is currently what happens when the power switch is pressed:

* Fan turns on
* The backlit buttons (Run/Stop, Single, Wave Gen and the channels) flash twice then remain off
* Ref, Math, Digital and Serial lights turn on one after the other and stay lit.
Nothing happens after. Backlit buttons don't light up when pressed.

I took it apart to check for anything visually obvious like burned components or disconnected cables, but didn't notice anything. The scope behaved the same way after reassembly.

Any ideas?

AndyC_772:
Sounds like the well known NAND Flash corruption issue. The scope's firmware is stored in a memory device that's not 100% reliable, and later software versions included mitigation that allowed it to be recovered in the event of the application becoming corrupted. Earlier firmware could simply crash.

IIRC the only fix is to return it to Keysight to be re-flashed, but they have been known to do this on out-of-warranty scopes as a goodwill gesture. It's definitely worth asking, IMHO.

elemenoh:
Thanks for the suggestion. I'll try reaching out.

elemenoh:
I've written to Keysight to see if they'll take care of it. If not, is there a DIY fix for this?

switchabl:
Several people (myself included) have successfully fixed this using the internal serial console. See the "hacking" thread for more information: https://www.eevblog.com/forum/testgear/dsox2000-and-3000-series-licence-have-anyone-tried-to-hack-that-scope/msg4525313/#msg4525313

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