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Repair and disassembly guides for many types of Linksys routers.

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Damaged UBIFS & Syscfg linksys Ea8100 v1

I directly connected to my ea8100 Linksys router using serial port after I connected wrongly and without knowing the dangers of two commands (never test these two)
nand erase ubifs
nand erase syscfg
I wrote, after turning the router off and on again, the router did not boot, and even its lights did not turn on, and serial communication was not established, and nothing booted at all!!!!

Is there a way to fix the router?
How can I check if the bootloader is damaged or not?
Should I use CFE files if I want to rewrite the bootloader or ubifs? Where should I find the file for this router?

I don't know much about electronics and the destructive effects of these two commands on NAND.

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Hi @seyedmojta28762

Unplug everything from the router except the Power cable and then press and hold the Reset button on the back of the router until the power LED starts flashing to reset the router to factory settings and see if that works.

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Hi, thank you for taking the time to answer. I have tested your method several times, but unfortunately I did not get an answer. It seems that the nand has a problem. I found a few links. Maybe you can help me. My problem is that I can't connect through serial communication and I can't configure anything and I don't know how to rewrite ubifs.

https://openwrt.org/toh/linksys/ea8100_v...

https://www.linkedin.com/pulse/understan...

https://linux-mtd.infradead.narkive.com/...

https://forum.openwrt.org/t/corrupt-boot...

https://www.linksysinfo.org/index.php?th...

https://forum.openwrt.org/t/linksys-ea85...

https://forum.openwrt.org/t/creating-a-u...

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@seyedmojta28762 sounds like you deleted your bootloader as well as either all or just part of the firmware. I would check the threat on here and see if that gets you anywhere.

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Thank you for taking the time to answer. Unfortunately, I don't know exactly what firmware and through what connection I should put into nand, there is no mention of connection or more detailed explanation in the link. I found a series of links. I would be grateful if you could guide me.

https://openwrt.org/toh/linksys/ea8100_v...

https://www.linkedin.com/pulse/understan...

https://linux-mtd.infradead.narkive.com/...

https://forum.openwrt.org/t/corrupt-boot...

https://www.linksysinfo.org/index.php?th...

https://forum.openwrt.org/t/linksys-ea85...

https://forum.openwrt.org/t/creating-a-u...

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@seyedmojta28762 that is way outside my comfort zone :-) This is a task that I will have to pass on. Maybe my colleague @jayeff or @aactech can help you further with that.

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@oldturkey03

My experience is just with reflashing. I can't really add anything here accept in the future ALWAYS back-up before doing anything.

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@oldturkey03

Mostly the product support firmware downloads are just updates (enhancements/bug fixes etc) to the existing firmware and not the entire firmware file.

So I think the bigger problem will be finding the original firmware file, as this would be necessary before working out how to reflash the chip, Might be easier to find a hardware damaged only, exact same router and replace the chip from it and hope that the replacement chip is still OK

Don't know about routers but with PCs they're usually called the BIOS.bin file.

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