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Agilent DSOX3054A not booting possible NAND corruption HELP! (RESOLVED)
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analogRF:

--- Quote from: Jwalling on February 06, 2021, 09:56:17 am ---The document that Keysight did not make public for some reason. ;)

--- End quote ---

Thanks, this can really be helpful if I want to send it to Keysight for repair

well well well...according to this document, they may not consider my scope as having a NAND corruption after all
I dont have a boot loop and the LEDs dont  "continually flash through the boot sequence"
what happens is that first a bunch of LEDs very quickly flash simultaneously and then MATH and REF LEDs come on and stay on forever.

If they really stick to their flowchart, then I guess they will consider this as a normal repair procedure = $4026 CAD + TAX  :scared:
which is a non starter for me
analogRF:
even though there is no doubt that this is a NAND corruption issue but I am beginning to think that not having that 23V rail
could also be a secondary problem that prevented from booting after I uploaded the image through serial port

does anybody know if that 23V rail should always be ON after power is switched on or if it comes alive after a while?
Pinkus:

--- Quote from: analogRF on February 06, 2021, 11:34:59 am ---well well well...according to this document, they may not consider my scope as having a NAND corruption after all
I dont have a boot loop and the LEDs dont  "continually flash through the boot sequence"
what happens is that first a bunch of LEDs very quickly flash simultaneously and then MATH and REF LEDs come on and stay on forever.

If they really stick to their flowchart, then I guess they will consider this as a normal repair procedure = $4026 CAD + TAX  :scared:
which is a non starter for me

--- End quote ---
a) As Keysight is replacing the main board when the NAND problem occurs, it seems just to re-install the firmware through the UART interface is not the best/preferred solution. If this would be an acceptable long term solution, Keysight would do it by themselves. Instead they are always changing the expensive board, lets assume they know why.
b) My scope did NOT show the usual LED-cycle boot loop too. Nevertheless it was repaired for free.
c) A check through Keysight is free of charge. You may send it in and IF they decide that it is not a NAND problem (=you would have to pay a new board), then you still can decline the repair and you will get your unit back free of charge.

Thus a) + b) + c) shows: they is NO REASON for messing with this by yourself before Keysight had a look at it. Otherwise this might end in an expensive experience.
This is what I did and a I got a scope with a brand new and freshly calibrated main board back. If not, I would have tried to replace the NAND chip.

So my advise: send to Keysight, add a printout of the UBoot prototcol and point to the NAND corruption service note.
Pinkus:
Mmmmhhh. I was just reading the service note.
At page 1 it says: "NO CHARGE AVAILABLE UNTIL:  31-Oct-2019".
I am wondering if this means that DSOX/MSOX 2K/3K with NAND corruption will not be repaired for free anymore?
analogRF:

--- Quote from: Pinkus on February 06, 2021, 01:49:06 pm ---Mmmmhhh. I was just reading the service note.
At page 1 it says: "NO CHARGE AVAILABLE UNTIL:  31-Oct-2019".
I am wondering if this means that DSOX/MSOX 2K/3K with NAND corruption will not be repaired for free anymore?

--- End quote ---

yes I saw that too  :-//
Still it is a bit hard to believe Keysight will keep replacing the board of these scopes for free until all NAND corrupted boards out there are replaced!
this particular scope is almost 8 years old...but since this line of scopes has not ended yet, maybe they still do that repair for free...I'll call them on Monday.
I will get my LAN board o Tuesday I think and if I dont reach an agreement with Keysight, I'll try that network method

However, that missing 23V rail is still bugging me
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