My laptop is making a screeching sound when I plug in the charger(the battery is down) but when I switch on the laptop the sound stops and when I switch off the sound continues.
Sounds like you need a new battery or new charger. If the laptop is several years old I would start with the battery. It may also be the charging circuit and plug but without replacing things there is no way to tell for sure.
Sounds like you need a new battery or new charger. If the laptop is several years old I would start with the battery. It may also be the charging circuit and plug but without replacing things there is no way to tell for sure.