I have an infinite loop of gray and black screen switching when keyboard and laptop is on.

I have tried overclocking my monitor but it went wrong and I restarted my computer (Acer Nitro 5 AN515-54) and It showed the acer logo and I heard the boot up for windows sound but it was a black screen and kept switching to gray screen then back to black screen every 3 seconds. Eventually after 20 seconds it loads advanced and troubleshoot options. Which first it asked for keyboard layout then troubleshoot options and I tried repairing but It didnt scan anything wrong. Please help me I dont know what to do.