The SD card slot of my Raspberry Pi was broken. I tried to replace (solder) it with one that i bought at eBay but with no success.
I know that a SD slot is required but is there another a way to get my Raspi working without a SD card?
My Raspberry Pi 3 is booting without an SD card.
I flashed the same distro image (LibreElec) onto an SD-card and an USB stick (using Linux and with the
dd command). After that I've changed the
cmdline.txt in the boot partition from both, SD-card and USB stick.
Finally I've added
program_usb_boot_mode=1 to both
config.txt files, which enables booting from usb stick.
I don't think that'll help you, however it could be helpful for someone else.
The easiest way would be to actually complete the task you started in the first place, to replace the sd card slot.
There is an excellent guide at techunboxed with instructions to fix the SD card slot.