My laptop deletes OS itself after sometime

So i have installed on arch on this laptop and it ran for sometime couple of days no problems and recently i didn't charge the laptop for a while so today i boot up the laptop and the os is gone like there is no arch anymore it seemingly deleted itself.

Note i didn't tinker with anything in konsole or in arch or change anything. This happened before when i gave it to a repair shop to fix the keyboard they replaced the keyboard and when the booted the system this same thing has happened

Rn i tired to reinstall os couple of times already but for some days it will run without any problems but after sometime it gets deleted

What's going on ??