I have no idea what should I do now. I've downloaded the exact name of my router on "Firmware OpenWrt Install URL" on here: [OpenWrt Wiki] JCG JHR-AC876M After I installed it on the OEM "website" I waited 15 minuites before powering it off and on again. The router than kept restarting. I tried to press the "reset" button for a few seconds in hopes of doing this again, but then the power led won't even turn on. is only when I press the "WPS" button a few seconds after powering it on then the "WPS" led will be always on and stop restarting.
I do not know how this works and I needed some help. I also have ethernet cable plugged in to my PC the whole time.
Thanks in advance.
Try the web recovery https://web.archive.org/web/20201003032852/https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=1b7199c90c7128e3f81cc4abc6d80ab76a820b12, if it doesn't work, you'll need serial.
Try an older Openwrt image for cross flashing.