GL-M9331-Plus bricked

I have updated software via u-boot (with tftp) but now the device is bricked and on console no message is displayed (probably I have corrupted the u-boot partition on flash);is there a method to do a factory reset and recover my device?

Thank you

if you damaged the uboot, the only way to recover it is to desolder the flash and program it with a SPI programmer.

There are also some tools you can try to use without desolder the flash chip:

many thanks for the information, I will buy that product and try to recover the flash