Laptop Won’t Turn On After Removing Battery While Charging.

I recently encountered an issue with my laptop where it stopped working completely after I removed the battery while it was charging. The laptop immediately shut down and wouldn’t power back on. I took it to a repair shop, and they were able to get it working again. However, after about four days, the laptop went blank and won’t turn on again.

The laptop does not show any signs of life—no lights, sounds, or fan activity when pressing the power button.

What steps should I take next to diagnose and potentially repair the laptop myself?