My netgear 4300 brick from 19.07.3 to 21.02.1

Installing and Using OpenWrt
2

which image did you use? What is the exact filename?

Also, which version of the 4300 do you have? (v1, v2, sw, tn, etc.) -- you can find this info on the info panel of the router.

3

wndr 4300 v1 sysupgrade file. I see when power led blink green, there should be tftp to 192.168.1.1? but now ping 192.168.1.1 no effect, tftp timeout.

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what was the exact filename?

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openwrt-21.02.1-ath79-nand-netgear_wndr4300-squashfs-sysupgrade.bin,
is it because of large step from 19.07.03 to 21.02.1?

6

No, the step isn't the issue on the surface.

Did you try to keep settings?

7

Did you follow the TFTP process described on the device info page? You'll need to use the factory image for this process.

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In the first post...

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I somehow glossed over that. Thanks.

@youxiaojie - try failsafe mode.

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10

Based on the SHA in the first post, the firmware that was used looks like the ath79-nand sysupgrade for the WNDR4300.

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11

now it seems entered tftp mode automaticly. I connect ttl tomorrow to see the detail. could not pingable.

12

no, not keeping setings. is it the reason?

13

Keeping settings can cause issues across major version upgrades in general and may be completely incompatible for devices that have transitioned to dsa

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14

god bless me. I hope uboot is ok. unlike 25 spi flash, nand is hard to burn uboot.

15

now 192.168.1.1 is not pingable. no-rely.

16

the transition from ar71xx to ath79 doesn't help, but it wouldn't cause a brick

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17

I manage a netgear 3700v4 which is a close model of the 4300. I had issues with it while upgrading from 19.07 to 21.02. It was solved by the method I described. Once 21.02 is flashed, you can safely use upgrading to the next releases.

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thanks to pepe2k! I love your uboot! I love all your work. the only pity thing is ar7161 and ar7240 cpu not supported!

20

thanks!! very good! netgear's uboot has this extension is a great idea!

21

Download https://downloads.openwrt.org/releases/21.02.1/targets/ath79/nand/openwrt-21.02.1-ath79-nand-netgear_wndr4300-squashfs-factory.img and use tftp upgrade.