So, reporting back after doing a "nuclear reset" of my 86u using this post -
https://www.snbforums.com/threads/major-issues-w-rt-ac86u.56342/page-4#post-495710 from @
L&LD
So what i did was:
1 - A dirty flash from 384.12-beta2 to 384.12 stable before anything else.
2 - Turned the router off and pulled out every cable and usb drive for an hour.
3 - Got to step 2 of the guide - WPS NVRAM Erase - this is when i got the first problem! In other words, every time that i did the procedure of step 2 the router would no finish booting even after several minutes of waiting! In other words, I would hold the WPS button, then plug the power cable while the power button was on, then would try holding it for 10, 15 or 30 seconds(many tries with different times on holding the wps button) and i was always getting the same behavior... The router would start powering like it should, the led for lan port 4 would turn on and off right after and then the power led would come on but after a few seconds it would turn off, the router would stay with all lights turned off for one sec or two and then the led for lan port 1 would turn on and start showing activity(blinking, since on port 1 was the only cable connected to the router to my desktop). But the router would never come back online completely, my pc it would not receive a ip from the dhcp and only the led on would be the lan port 1 that would stay on and blinking, the other leds and lights would never come on even after 10 min or more of waiting and the web interface and wireless networks would also not come online!!!!! But if i then turn off the router and turn it back on, it would go to the wizard like it was suppose to do! So, i am very confused if the procedure was successfully or not.
4 - After that, I followed the rest of the guide until step 7 and after the reboot, when i was doing the minimal setup to connect to my isp like the guide says, when i was doing the vlan part(that is required by my isp to connect my pppoe) under lan->iptv, when i clicked APPLY the router reboot like it should to apply the vlan, the problem is that when it did the reboot i got the problem that is the main reason why this thread exists, in other words, router was completely black with all lights turn off! I had to power cycle it, for it to come back!
This problem is so fracking random and annoying!