Backlight shutting down randomly after gpu replacement

Hello together!

I have replaced the GPU due to a GPU error (no boot only in safe mode and then with horizontal stripes at the cursor).

Everything worked fine for a few hours, but now the backlight of the LCD goes off at random intervals (LCD works, but no backlight).

I now opened everything again and saw that the Vsync flex cable is damaged (pins broken) probably I was too rough during disassembly....

Can I now simply replace the cable and everything works again or is more defective?

If I do not connect the cable the error remains unfortunately...