Boot error on CISCO 1852

ExailAero — Thu, 16 Apr 2026 14:44:34 GMT

Hi,

I have a CISCO 1852 Access Point stuck at (RNAQ-C7) prompt after boot and detecting a nand0 error. Here after the boot log ...

Is it a hardware error ?

If not how to reload a firmware using maintenance link ?

Thanks for your answers.

U-Boot 2012.07 (btldr release 41) (Jan 05 2021 - 13:03:00)

This product contains some software licensed under the
"GNU General Public License, version 2" provided with
ABSOLUTELY NO WARRANTY under the terms of
"GNU General Public License, version 2", available here:
http://www.gnu.org/licenses/old-licenses/gpl-2.0.html

DRAM: 1 GiB
NAND (ONFI): Detected MICRON MT29F2G08ABBEAH4 [256 MiB]
ipq_nand: unsupported dev. configuration
SF: Detected Macronix MX25U3235F [4 MiB]
MFG data loaded
Scanning shenv data blocks
Total valid parts=4
Active shenv part[1:0], write_counter=7
PCI0 Link Intialized
PCI1 Link Intialized
Net:
PHY ID = 0x4dd074, eth0 found AR8033 PHY
PHY ID = 0x4dd074, eth1 found AR8033 PHY
Valid I2C chip addresses: 51 52
AP 1832/1852 detected...
Power Type: 802.3at POE detected...
Signature returns 0
BL signing verification success, continue to run...
Auto boot mode, use bootipq directly
Hit ESC key to stop autoboot: 0
Specified BOOT: part2
Device nand0 not found!
Error initializing mtdparts!

Booting from part2

Device nand0 not found!
Error initializing mtdparts!
Device nand0 not found!
Error initializing mtdparts!

Booting failed, try boot on part1

Device nand0 not found!
Error initializing mtdparts!
Device nand0 not found!
Error initializing mtdparts!
(RNAQ-C7) #

Re: Boot error on CISCO 1852

Mark Elsen — Thu, 16 Apr 2026 14:57:34 GMT

- @ExailAero >.....Device nand0 not found!
nand0 is an internal storage component, nothing else but RMA

Re: Boot error on CISCO 1852

Leo Laohoo — Fri, 17 Apr 2026 03:28:11 GMT

Do not waste any more time and contact Cisco and organize an RMA.

NOTE: Every Cisco indoor AP purchase comes with/includes Limited Lifetime Hardware Warranty.

Re: Boot error on CISCO 1852

ExailAero — Fri, 17 Apr 2026 06:36:50 GMT

Thanks for your quick answers, have a nice day

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