Black screen after update from 3.19.
Come on guys…
11th gen 13" in a coolermaster case. No battery or lcd.
Video on external monitor in bios mode was working fine before. Only problem was that if the bios settings were wiped from the RTC battery problem (come on guys…) then the only way I could get video in bios mode was with an ASUS MB16AC that is natively USBC DP that I luckily just happen to have. Once I got a new cmos battery and saved the settings again, then after that a normal hdmi monitor worked even through a generic dongle. But the portable usbc-dp monitor always worked even with a reset bios.
Updated from whatever to 3.19 a few weeks ago with no problems.
Applied the 3.20 update from windows 10 on nvme (though not the only OS installed)
And now no video, and fan never spins.
short press (2 sec) , long press (15 or so sec), switch which side has power vs video, try v1 hdmi module, try generic hdmi/ethernet/power dongle, any/all of which which worked before, nothing.
2-second press and then wait 10-15 seconds, and the leds flash green, red, & amber alternately, mostly green, then shut off.
press something like 15 seconds or more and the leds flash blue & red for a bit, then what looks like the same mostly gree pattern as the short press, then off.
Tried a few different 100W supplies and a few different cables (all of which have worked for full power many times before). Tried using a v1 hdmi module instead of the generic dongle, as well as the above usbc-dp monitor which always worked in bios & bootloader before.