Luban route stuck on the boot page after swiping U-Boot? A brick-saving note will bring you back to life in place

1. Fault phenomenon

after flashing U-Boot (or Breed) for Luban (CreativeBox-CB3), the web background can no longer enter the system, and as soon as the browser is opened, it is the "U-Boot update page" - upload, restart, re-upload, dead loop. TTL serial port observation, it was found that the machine always stopped at Hit any key to stop autoboot, while the manual bootm prompted Bad Magic Number. This shows that firmware is not actually written in, or written in the wrong place.

2. The reason for 90% of the crater

according to the summary of a large number of netizens, sorted by frequency of appearance:

3. Necessary steps before saving bricks

disassemble the machine to connect TTL: TX→RX, RX→TX, GND→GND, baud rate 115200.
power-on maniac presses space to enter the Breed command line (if you see =>, it is the official U-Boot).
the static IP of the computer network port 192.168.1.2/24, open the tftpd32 firmware directory.
as long as you can see the serial port menu, the machine will be saved; There is no output of the serial port, so the SPI programmer is needed.

4. The three-step method of resurrection in place

STEP-1 Confirm the partition

perform in Breed

part

should see normally

mtd0 0x00000 0x30000 "Bootloader" mtd1 0x30000 0x10000 "Config" mtd2 0x40000 0x10000 "Factory" mtd3 0x50000 0x7a0000 "firmware"

firmware must start with 0x50000, otherwise the address you swiped before must be wrong.

STEP-2 Reflashing the firmware

Breed Menu Selection

Firmware Update → General Firmware → Browse → Check immortalwrt-mt7621-creativebox-squashfs-sysupgrade.bin

key points :

only select the "Firmware" partition, do not manually fill in the address ;
after the upload is completed, wait 5 minutes for Breed to complete the verification + write + synchronization;
see Update completed, rebooting... power off and restart.

STEP-3 Validation Startup

TTL should appear after rebooting

[ 0.000000] Linux version 5.15.xxx [ 0.700000] mt7621_eth: done

browser access 192.168.1.1 has become an OpenWrt login page, and you're done.

5. If you still return to the U-Boot page

Firmware change: immortalwrt, official R1911, Padavan all try once;
change browser: Chrome uploads large files occasionally TCP Reset, which can be solved by changing Edge/IE;
Revert U-Boot: If you want to use the official system again, you must first write the official u-boot-mt7621-68.bin back to mtd0, and then flash the official firmware, otherwise it will always prompt that it is not compatible.
Breed Command Line Example:
```
mtd write u-boot-mt7621-68.bin Bootloader reset
```

6. Summary

"upload 100% ≠ flashing complete" - MT7621 models such as Luban/New Route 3/CR660x, Web-Uboot can easily give people the illusion of "fake success"; As long as TTL can enter Breed, you can operate in the order of "check the partition first→ then brush the firmware→ and wait patiently for 5 minutes", and it can basically be revived in place without the need for chip detachment and programming. I wish you all to light up once and stay away from bricks!

A shallow smile i...Reply

#31

Stuck on the startup page after flashing U-Boot is really frustrating, but there is hope for following the steps. The key is to confirm the partition and use the TTL serial port correctly, and patience is the key to saving the brick.

2 个月前

His eyebrows and ...Reply

#30

The card startup page after swiping U-Boot is really a headache, and manual operation is prone to errors. It is recommended that novices be cautious and keep a backup of the original firmware to avoid falling into a dead loop.

The wild geese fl...Reply

#29

After swiping U-Boot, the card startup page is really crashing, especially the dead loop cannot enter the system, and the manual operation and error are reported, which is really helpless.

Half a cup of teaReply

#28

It is indeed a headache to get stuck on the startup page after swiping U-Boot, especially when encountering the Bad Magic Number error, manual operation is prone to errors, it is recommended that novices operate with caution and seek professional guidance if necessary.

Old dreams are ha...Reply

#27

After swiping U-Boot, the startup page is really crashing, and manual operation is prone to errors. It is recommended that novices be cautious, otherwise they may fall into a dead loop and need to disassemble the machine to connect TTL to recover, which is a complex and risky process.

On the streets of...Reply

#26

Stuck on the startup page after flashing U-Boot is really crashing, and you must carefully confirm the partition and file location before operation, otherwise you may get stuck in a dead loop. It is recommended to check more information and avoid blind attempts.

Far awayReply

#25

It is recommended to check whether the partition is correct first, and then make sure the firmware file is correct to avoid errors when reflashing.

It's better to go...Reply

#24

It is recommended to confirm whether the partition and firmware path are correct to avoid repeated programming.

3 个月前

I will never forg...Reply

#23

After swiping U-Boot, the card boot page is really collapsing, obviously I press the space but can't enter the system, I can only rely on the TTL serial port to save the brick, it's really painful and exciting.

Dream back to you...Reply

#22

Swiping the U-Boot card startup page is really a headache, especially when encountering the Bad Magic Number error, which is time-consuming and laborious to troubleshoot. It is recommended that novices consult more information to avoid blind operation.

Pear blossoms wit...Reply

#21

It is recommended that novices understand the partition information before operating to avoid repeated programming and unable to recover.

Wandering poetReply

#20

After swiping U-Boot, the card startup page is really a headache, pressing the space to enter Breed is the key, static IP and tftpd32 can be used together to save the machine, but the operation needs to be cautious to avoid making mistakes again.

Cool summer breezeReply

#19

The card startup page after swiping U-Boot is really a headache, and manual operation is prone to errors. It is recommended that novices understand the process clearly and avoid blind attempts, otherwise they may fall into a dead cycle and really "save bricks"!

Southern girlReply

#18

It is recommended to check whether the partition is correct first, and then try to operate through the TTL serial port to avoid wasting time on repeated uploads.

The sunset over t...Reply

#17

It is recommended to confirm whether the partition is correct first, and then try to operate through the TTL serial port to avoid wasting time on repeated uploads.

Luban route stuck on the boot page after swiping U-Boot? A brick-saving note will bring you back to life in place

1. Fault phenomenon

2. The reason for 90% of the crater

3. Necessary steps before saving bricks

4. The three-step method of resurrection in place

STEP-1 Confirm the partition

STEP-2 Reflashing the firmware

STEP-3 Validation Startup

5. If you still return to the U-Boot page

6. Summary

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Luban route stuck on the boot page after swiping U-Boot? A brick-saving note will bring you back to life in place

1. Fault phenomenon

2. The reason for 90% of the crater

3. Necessary steps before saving bricks

4. The three-step method of resurrection in place

STEP-1 Confirm the partition

STEP-2 Reflashing the firmware

STEP-3 Validation Startup

5. If you still return to the U-Boot page

6. Summary

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