Big Question About CRU and Restart64.exe

I was using CRU to "overclock" my laptop monitor and it worked like epic
i did 60Hz to 70Hz,
but i wanted to try 40Hz for lols and i was bored to restart my lap again etc
so i started restart64.exe, it restarted my drivers,but after this, i cant "overclock" again like, if i try to use 1024x768 70Hz, the screen goes black,white,green,red,blue and loops, then i goes back to normal (Intel Panel with 15 seconds wait confirmation)
btw no problems when i did 1024x768 70Hz, worked fine, no artifacts or random bugs in the screen

edit: also when i was doing 40Hz, i used LCD Standard instead of manual (untouched/default)
edit2: Monitor is BOE05FE (https://prnt.sc/ph7b4y)

Specs:
Cpu: Intel Core i5 5200U
Gpu: Intel HD Graphics 5500U (lastest Driver 15.40.42.5063)
8 GB Ram
1TB \ Windows 7 64-bits UEFI GPT