Root cause: Broken Graphic Card, had to replace a new one, also disk controller was broken. Cost of service: 360$
Hi, So recently I got a Dell Precision 7520 - and I installed Ubuntu, 20.04.3, so I changed from RAID to AHCI mode. After few minutes I thought that I might clean up every single disk (cause I wanted to) on this laptop so I entered BIOS and I choosed to Wipe on Next Boot. The process was so long that I thought that it actually froze so I pressed Power Off button. After I did that I'm no longer able to enter BIOS either via F2 or F12 but I was able to use recovery and flash latest BIOS via USB Stick (Precision_7x20_1.21.0.exe) and changed the file name to BIOS_IMG.rcv and process recovery is ending with full success, but I'm still not able to see the BIOS after I press F2 or F12 - I see black screen. In addition I also did the screen test (pressed D) and all colours are ok. Can someone help me what can I do in such situation ? I have only one disk M2 and one HDD (that were provided to me) and two RAM sticks (each 16 gb). Thanks for an answer and help.
Dell Precision 7520 - Unable to Enter BIOS (via F2 or F12) after Wipe on Next 
Boot option usage.