unplug it from the wall outlet and battery is not charging

@habte88913 so for now let's not worry about "Internet is not working due to proxy error" that is a totally different area :-). 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

Of course, you may also have to consider replacing the battery. A depleted battery can no longer be charged. However, it should not prevent your computer from coming on, if it is connected to the AC adapter.Post Some good pictures of what you see. That way we can see what you see

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Download the MAintenance and service guide for your computer from here Page 42 will help you replacing the battery.