DellXPS15-9550-OSX VS OptiHack

I wanted to get my HDMI working on my xps15 9550 and tried this: https://github.com/krim404/DellXPS15-9550-OSX/blob/12.0/Tutorial_12.0_Step7.md

Now it is flashing with its front LED 3x amber, 6 times white, after which it reboots, and flashes it again. There is no dell logo or anything appearing on screen. So it seems the bios is bricked. I tried inserting a fat32 usb with BIOS_IMG.rcv copied onto it, as explained here (https://github.com/krim404/DellXPS15-9550-OSX/blob/10.13/Additional/bios_upgrade.md) , tried resetting the bios by unplugging the CMOD bios battery and main battery and letting it sit for a while, but to no avail.

Used the OptiHack guide and files at GitHub here for install

Hi, i want to hackintosh my dell. I used https://zearp.github.io/OptiHack/ efi files And after booting it is a black screen with no text Dell Optiplex 7020 I3 4150 1tb hdd Intel hd graphics 4400 Can somebody tell me what im doing wrong

Tonymac's EFIs are bloated and I wouldn't rely on them. Maybe you can try this guide/repo as it seems up-to-date.

Check out here for detailed instructions specific to the 7020/9020 https://zearp.github.io/OptiHack/ I’m running a 7020 SFF myself

Followed this guide: https://zearp.github.io/OptiHack/

Followed the guide here: https://zearp.github.io/OptiHack/ as well as some tips from Dortania Github. Same guide also worked on another Optiplex 7020 for Monterey.

That config needs a lot of fixes. Too many to go over in a comment. Also missing a bunch of ACPI patches. Also, did you unlock CFG Lock and set DVMT and usb stuff using a modified grub shell? The 9020 is pretty solid but does require some leg work. I suggest taking a look at this guide, maybe compare your config to it. They seem to have all the bases covered.