GL-INET Opal User Manual page 141

You can also refer to our video,
FailSafe.
1. First you have to download firmware to your computer. You can
download the firmware here. For GL-AR300M, GL-AR300M-Ext,
GL-AR750S-Ext, GL-E750, GL-X1200, please download the .img
firmware file. For GL-B1300, GL-S1300, please download
the .img firmware. Everyone else, download the .bin firmware
file.
2. Connect your computer to the Ethernet port (either LAN or
WAN) of the router. You MUST leave the other
port unconnected.
3. Press and hold the Reset button firmly first, and then power on
your device. (If your device does not have a power button,
plugging it in will power it on automatically.)
If you can not find the reset button, please refer to our
page, How to Repair and
Release your finger when you see the LED has flashed:
4. The Power LED will light up. Then, other LEDs will start flashing.
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How to Recover GL.iNet Mini Router by U-Boot
Reset.
6 times for GL-MiFi, and then the LTE light will faintly
flash twice.
5 times for GL-AR150, GL-AR300M, GL-USB150, GL-
AR750, GL-AR750S-Ext (Slate), GL-X750-Ext (Spitz),
GL-MT300N-V2, GL-E750 (Mudi).
4 times for GL-S1300, GL-B1300.
The leftmost LED may stay on the whole time while
the rightmost LED flashes 4 times, then the middle
LED turns on and stays on.
(For some old GL-B1300, the leftmost LED stays on
the whole time, and both the middle LED and the
rightmost LED flash 5 times at the same time then
they stay on.)
3 times for GL-MT300N, GL-MT300A.
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