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Agilent MSOX4054A repair (NAND corruption issue)
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hotacid:
All: Daniel has reached out to me and it's looking like the scope probably does have the known NAND corruption issue, and if so, it will be repaired by Keysight at no cost. I can't turn up an offer like that so I'm ending my repair attempt of it.


--- Quote from: tv84 on January 17, 2020, 09:40:25 am ---
--- Quote from: hotacid on January 17, 2020, 05:54:41 am ---Yes, I can stop the bootloader.

--- End quote ---

Those are good news. Go into NAND susbsytem and see what commands are available.

Attach them here.



--- End quote ---

tv84: Please see the attached log. I dumped the NAND commands and also tried reading a few pages but it always returns all 0xFF for every byte. I've tried reading pages 0 to 3.


--- Quote from: PA0PBZ on January 17, 2020, 08:00:21 am ---
--- Quote from: hotacid on January 17, 2020, 05:54:41 am ---The second is after the "PBOOT" primary boot loader image, which appears to be a Windows CE 6.0 standard bootloader. From there, I have four choices (again, see log). One very interesting one is an option to boot over ethernet. I tried this but the scope is waiting for some response from a host machine over the network that appears to be related to a "Windows CE 6.0 Platform Builder" tool that I need to see if I can get a copy of.

--- End quote ---

I compiled a tool that you can use on a windows machine many moons ago: https://www.eevblog.com/forum/testgear/dsox2000-and-3000-series-licence-have-anyone-tried-to-hack-that-scope/msg1022267/#msg1022267

The story behind it: https://www.eevblog.com/forum/testgear/dsox2000-and-3000-series-licence-have-anyone-tried-to-hack-that-scope/msg1022248/#msg1022248

--- End quote ---

PA0PBZ: Thanks for the tool! I tried it out and it worked to send the image I had for v4.08 of the firmware. The scope got further than I've ever seen it get - it started booting it and the front panel LEDs went through more steps than before - but it must have hit a problem during the boot because eventually the LED sequence went into an infinite cyclic pattern. Unfortunately, there's no more serial output after it starts trying to boot it so I can't say what went wrong. Most likely it's because the firmware version I'm trying to boot is quite different from the 3.xx version already on it. I attached my boot log.
Pinkus:

--- Quote from: hotacid on January 21, 2020, 02:45:56 am ---All: Daniel has reached out to me and it's looking like the scope probably does have the known NAND corruption issue, and if so, it will be repaired by Keysight at no cost. I can't turn up an offer like that so I'm ending my repair attempt of it.

--- End quote ---
Congratulation. It looks like everything's gonna turn out just fine for you.
However, I'm surprised the Keysight Repair Center turned down the free repair without even seeing the unit. At least they should have offered to check it. Did Daniel have anything to say about this?
hotacid:

--- Quote from: Pinkus on January 21, 2020, 09:47:05 am ---
--- Quote from: hotacid on January 21, 2020, 02:45:56 am ---All: Daniel has reached out to me and it's looking like the scope probably does have the known NAND corruption issue, and if so, it will be repaired by Keysight at no cost. I can't turn up an offer like that so I'm ending my repair attempt of it.

--- End quote ---
Congratulation. It looks like everything's gonna turn out just fine for you.
However, I'm surprised the Keysight Repair Center turned down the free repair without even seeing the unit. At least they should have offered to check it. Did Daniel have anything to say about this?

--- End quote ---

Not specifically, no. Maybe it was a misunderstanding on one or both ends of the call. These things happen  :-//
Zucca:
In my experience Keysight is a company you can trust, and they trust you always unless there are evidences you are a stupid crook.

I hope all the company could go close to the Keysight standard.
HighVoltage:

--- Quote from: hotacid on January 21, 2020, 02:45:56 am ---All: Daniel has reached out to me and it's looking like the scope probably does have the known NAND corruption issue, and if so, it will be repaired by Keysight at no cost. I can't turn up an offer like that so I'm ending my repair attempt of it.

--- End quote ---

I had two scopes with NAND problems repaired by Keysight over the years and never had an issue.
Keysight is an amazing company, that has always taken care of any problems I had.
Great that it worked out for you as well.
And great that we have Daniel here.

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