Device not switching on

@lanry you are not really telling us a lot here. Would be nice to know what you have checked and if anything has happened to this Thinkpad. Anyhow, I suggest you start with the basics for all devices and check a few things.

First you want to check your power supply. Make sure it has the proper voltages. Check to make sure connectors are not bend etc. After that, check the charging port. Clean it of any debris etc, use a few puffs of air to clean it out. Check the DC-in jack of your laptop. Make sure there is no corrosion, debris etc. that prevents it from working. If none of this works, get a ammeter and see if your laptop draws any amperage from the charger. After that, you need to check and see if your motherboard even gets power. For that of course, you need to open it up. Post Some good pictures of what you see. That way we can see what you see iFixitでの質問に画像を追加する方法