@BMcDowall
Hi, welcome to the community.
" can't reset it using the button at the bottom", Did you mean when holding the reset button, there is no change to LED status?
Please refer to the suggestions here to see whether S4 could get into firmware recovery mode: Power off Deco and use the pin to press and hold the reset button until powering Deco back.
If it is successful, you would be able to see the LED changes:
| Model |
Hardware Version |
LED status when entering firmware recovery mode |
LED status when upgrading firmware |
LED status when upgrade is finished |
manual reboot after firmware recovery |
| Deco M4/E4/S4 |
V1/V2 |
solid green |
solid green |
solid green |
yes |
How to use firmware recovery if the Deco become brick
Best regards.