Restoring a router after an update failure, any chance?

Question

network hardware

Good evening/morning/afternoon/night.
There is a cisco linksys WRT120n router.
We started updating the software, and at the time of the update, the power supply to the house was turned off.
After turning on, the router is loaded to the login form, and does not react in any way to the entered login and password (it just does not let it go further.)
They tried to reset it with the button - it did not bring any result.
I don’t really want to say goodbye to this miracle, tell me what kind of operation can be performed to restore it?
Thank you very much in advance.

Answer 1

Hello, one day my OpenWRT router turned into a brick. I disassembled it, connected via UART using Raspberry PI, you can just use the UART adapter, as it is more convenient. Well, in general, through the terminal and restored.
IMHO: find the UART on the board, see what it says when loading; there is 3.3V and 5V voltage, more often the first one
Here is a reverse engineering serial ports link to help, good luck
PS UART on TP-LINK TL-MR3020