… caused by my own tinkering.
Edit: SOLVED! simply disconnecting the drives and then adding them one by one (starting with the windows drive, dont know if thats important) did the trick
(Sorry if this is the wrong community for HELP ME posts like this, couldnt find one that fit the bill better)
So recently i made up my find about switching my self-build from 2018 from win10 to linux mint, though i first wanted to try it out in dual-boot. I created a bootable usb and started the installation process to a partition on an ssd thats seperate from the hdd that holds my windows installation. Installation worked out fine, PC powered down from live usb mint and booted into mint from my petition (worked fine). Afterwards i powered it down to check if i could access windows.
After turning it on, instead of showing the GRUB OS selections screen, it just showed a GRUB command window, and my keyboard wasnt recognized.
Powered down, disconnected the ssd in hopes of forcing windows to start, no luck. Entering BIOS via f2 or del on startup didnt work either (probably because fast boot was enabled), tried every available usb-port for the keyboard to either get into BIOS or at least get GRUB to respond. Nothing.
After shopping for solutions online, i cleared CMOS via the button on the mobo. I hoped it would either help the keyboard get recognised by GRUB, or at least deactivate fast-boot. But after powering the pc on again, my screen stays blank and the indication LEDs DRAM and BOOT are glowing.
I already tried taking out one of the two ram-sticks and placing the remaining one in each of the slots, then did the same withe other stick. No effect on the DRAM LED.
Im not quite at wits end here, but i thought before i continue to haphazardly apply fixes found online (and probably making it worse) i would look wether anybody here has good ideas for what steps to take next.
Here is my hardware:
Mobo: nzxt n7 b550
cpu: amd ryzen 5 5600x
gpu: amd rx 580 sapphire nitro+
psu: be quiet pure power 11 500W
ssd: kingston 240gb (linux boot)
hdd1: barracuda 1tb (win10 boot)
hdd2: wd blue 2tb (mostly games and stuff)
check the manual for your motherboard for the led indicators.
Check which key combo enters bios - from the manual!
Strip down the machine to bare essentials, no disk, one stick of ram, remove the video card if you have onboard video, etc. Start trying to get the most basic things to work before adding the next thing
Try swapping the power supply Try swapping the RAM stick, in another slot, different stick, etc
Simple, yet effective! This did the trick. Removed all but 1 RAM and cpu, could enter bios again. Added the gpu, still worked. Then first i added the drive with the windows partition, could boot into windows again. Afterwards all the other drives, and if i select ubuntu in bios boot order, im shown the GRUB that lets me select my OS, and both OS work without further problems.
Thank you very much!