after a couple of years (!) of searching and not being able to buy a 3000A/T model I finally got hold of a defective DSOX3054A which is stuck at boot. After a quick flash of several LEDs, only the REF and MATH LEDs remain on and nothing else.
Attached is what I got on the serial console and it looks to me to have a NAND flash corruption but I am not sure, I hope someone can confirm
I also ran a couple of informational commands after stopping the U-Boot which you can see in the attached file and below
U-Boot 2010.03 (Jan 26 2011 - 12:37:34)Agilent P500
CPU: SPEAr600
DRAM: 128 MiB
Flash: 512 KiB
NAND: 128 MiB
In: serial
Out: serial
Err: serial
SerNum:serial number not programmed
Chip: BD Board Rev: 4
Net: smsc
Press space to stop autoboot: 0
## Booting kernel from Legacy Image at f8050000 ...
Image Name: PBOOT
Created: 2011-01-27 11:38:14 UTC
Image Type: ARM Linux Kernel Image (gzip compressed)
Data Size: 36703 Bytes = 35.8 KiB
Load Address: 00000000
Entry Point: 00000000
Uncompressing Kernel Image ... OK
Starting kernel ...
Debug serial initialized ........OK
Microsoft Windows CE Bootloader Common Library Version 1.4 Built Jan 27 2011 02:04:15
Microsoft Windows CE 6.0 Ethernet Bootloader for the Agilent P500 board
Adaptation performed by Agilent Technologies (c) 2008
System ready!
Preparing for download...
Loading image 1 from memory at 0xD0600000
O
BL_IMAGE_TYPE_BIN
X
XXXXOOOOXOOOOOOOOXOXXOOOOOOOOXOOXOXOOOOXXXOOOOOOOOOXOOOOXOXXOXXOXOOOXOXXXXXXOOXXOOOOOOXOOXXOXXOOOERROR: Checksum failure (expected=0x1217115
computed=0x1217126)
****** Checksum failure on record 36, ABORT!!! ******
Completed file(s):
-------------------------------------------------------------------------------
[0]: Address=0x80361000 Length=0x12F9870 Name="" Target=RAM
Loading image 1 failed, trying next one
Loading image 2 from memory at 0xD1600000
BL_IMAGE_TYPE_UNKNOWN
Loading image 2 failed, trying next one
All images failed
Press r to reset
================================================================================================
p500> imls
Legacy Image at F8000000:
Image Name: XLOADER
Created: 2010-09-24 21:30:18 UTC
Image Type: ARM Linux Firmware (uncompressed)
Data Size: 5370 Bytes = 5.2 KiB
Load Address: d2800b00
Entry Point: d2800b00
Verifying Checksum ... OK
Legacy Image at F8010000:
Image Name: UBOOT
Created: 2011-01-26 19:52:00 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 194572 Bytes = 190 KiB
Load Address: 03f00000
Entry Point: 03f00000
Verifying Checksum ... OK
Legacy Image at F8050000:
Image Name: PBOOT
Created: 2011-01-27 11:38:14 UTC
Image Type: ARM Linux Kernel Image (gzip compressed)
Data Size: 36703 Bytes = 35.8 KiB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
p500> nand
nand - NAND sub-system
Usage:
nand info - show available NAND devices
nand device [dev] - show or set current device
nand read - addr off|partition size
nand write - addr off|partition size
read/write 'size' bytes starting at offset 'off'
to/from memory address 'addr', skipping bad blocks.
nand erase [clean] [off size] - erase 'size' bytes from
offset 'off' (entire device if not specified)
nand bad - show bad blocks
nand dump[.oob] off - dump page
nand scrub - really clean NAND erasing bad blocks (UNSAFE)
nand markbad off [...] - mark bad block(s) at offset (UNSAFE)
nand biterr off - make a bit error at offset (UNSAFE)
p500> nand info
Device 0: NAND 128MiB 3,3V 8-bit, sector size 128 KiB
p500> nand bad
Device 0 bad blocks:
p500>
I measured most or all of the voltages marked on board and they seem to be OK except one VP23V which is always 0V (see attached picture)
Other voltages are OK but some are less close than I thought they should be
The front USB has no power at all unless I stop the U-Boot then it gets 5.54V which seems a bit high!? (see the picture)
that's as far I have been able to go.
I have been/am reading the very very long thread on 2000/3000 and it is really next to impossible to find clear answer in 106 pages
![Banging Head |O](https://www.eevblog.com/forum/Smileys/default/bangheadonwall.gif.pagespeed.ce.8iLbFYV4Bc.gif)
if someone can give me a direction it is highly appreciated.