How can I bring MT-300A back to life?

I had no luck with routers GL-MT300A.
I bought 3 of them in 2016 year.
In the first router, soon stopped working Wi-Fi.
The second router after pressing the reset button for 10 seconds stopped working at all .

How can I bring them back to life?

PS. Third router with Firmware 2.265 is until still working.

You tried de brick using uboot?

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No, havenโ€™t tried it yet. Thanks for reminding me!

Hooray! :smile: MT300A has already been restored using your method!
alzhao, thank you very much!

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