Spin SP515-51GN-82UU laptop stuck on Black screen after BIOS downgrade attempt. Need help
Hi, I seem to have managed to brick my laptop by trying to downgrade my bios in order to be able to undervolt the cpu to prevent high temps while gaming. In order to be able to downgrade my bios, I had changed the platform.ini file so that it no longer checks if the version is the same or lower then currently installed.
My original Bios version was 1.14, and I wanted to go to Bios version 1.10, hoping that this would give me back the option to undervolt the CPU (which was disabled due to the 'Plundervolt' remedy).
So I ensured that the AC power supply was plugged in, then I started the Bios downgrade from Windows, the laptop rebooted, went into the Bios upgrade (downgrade) screen, started loading the new bios and after about 40 seconds the progress bar was at 100%. The laptop then rebooted again. It then made 2 beep sounds, the keyboard keys where illuminated but it never showed the green Acer logo... So I left it powered on like that for about 10 minutes. After the 10 minutes, it still was not proceeding, so I then powered it off by holding the power button. After I powered it back on again, still only the black screen and illuminated keys, the hard disk spins up for a couple seconds after that only the fans are slowly running.
I've checked with a flashlight to see if the screen is unlit, but perhaps still showing the acer logo, but nothing. Also a second screen, connected through HDMI, didn't show anything.
I've already tried the following things:
1) unplug the CMOS battery and Lithium battery from motherboard and leave unplugged for about an hour.
2) Put an extracted bios file for v1.10 so BuzKL110.fd on different size FAT32 formatted usb-sticks (512MB, 2GB and 16GB) and then inserted in the powered down laptop with inserted ac adapter, pressed and held fn + esc and then pressed the power button and released all keys at start up. The laptop boots untill the black screen, stays powered on for 30 seconds, then reboots again to the black screen and illuminated keys and then does nothing. Left it for 30 minutes, but nothing happens.
3) I've done the same with the original bios version so v1.14 and BuzKL114.fd.
4) I've also tried renaming the *.fd files to bios.fd
5) I've tried adding the wincrisis files MINIDOS.SYS and PHLASH16.EXE to the usb-sticks both with the *.fd files and also with the renamed bios files with extention *.wph.
Not sure what else there is to try, but I really would appreciate help. I hope anyone can help me!