RED LIGHT BLINKING

Hello everyone! I have a Razer Blade Stealth 12.5" Laptop and have been using it for almost three years now. Just yesterday, I was almost running out of battery, which was shown by the red light indication of the laptop (here, it was not blinking). As usual, I got my charger and connected it to the laptop for charging. After five minutes, I switched on the laptop (now connected to the charger), but I saw the red light blinking below, and for a brief moment I saw that the windows showed that the battery wasn't charging. Within 10 seconds, the screen goes off. I have unplugged and plugged in multiple times in carefully and comfortably, but to no avail. The screen goes off everytime within a few seconds. Now, I checked whether my charger was the problem, but my charger was working very well. The c type charger works with other devices. And every time I switch the laptop on, the indicator place where we see the green and white lights is now always BLINKING RED. Does anyone know how to rectify the issue?