RT-AXE7800 mcb load failed

[McKey]

Hi guys!

Anyone with idea what could be wrong with this router? (UART msg below) It stucks after the U-Boot SPL. Im im correct, that means it cant get the 2nd stage bootloader (u-boot) from the flash?
Also, anyone ever found explanation about the startup check, and what are they means? (Like USBT and UHD)
Regards.

----
BTRM
V3.0
MEM?
MEMP
CACH
DATA
ZBSS
MAIN
NAND
OTP?
OTPP
USBT
UHD?
UHDP
IMG?
IMGL
UBI?
UBIP
PASS
----

U-Boot SPL 2019.07 (Jun 08 2022 - 15:20:20 +0800)
Strap register: 0x7fffdf43
Board is non secure
$SPL: 5.04L.02@348603 $
nand flash device id 0xc2da9091, total size 256MB
block size 128KB, page size 2048 bytes, spare area 108 bytes
ECC BCH-8
FFinit done
find magic number 0x75456e76 at address 0x40000
CRC mismatch len = 16384
computed 7f6be855
expected ab0a667
no mcb specified explicitly, use safe mode
blob not found for magic 0xcb00cb sel 0x1607!
FFinit find magic number 0xcb00cb at address 0xa7000
reading blob from 0xa7000 offset 0x286c len 608
digest sha256 mismatch
mcb selector 0x1607 not found using  0x1607 instead
blob not found for magic 0xcb00cb sel 0x1607!
mcb load failed
### ERROR ### Please RESET the board ###

 

[McKey]

So. I figured it out. This message means that the code on the CPU flash (dunno wich CPU) are fine and cant read your corrupted external MXIC flash.
I got an another AXE7800 with a burnt CPU. I desoldered the MX30LF2G28AD flash from that one and i swapped that flash with the one with this problem above. And it runs. If you are out of warranty and get this same message above, order the MX flash chip above with an xGecu programmer and poke me for the AXE7800.BIN file. No need to thank for this, i already made some barbecue to celebrate myself.