My MacBookPro is continuously buzzing, the backlights are not working although it should be on. Tried to cover the sensor, but it's not that. Also, it's telling me that I have no batteries and the charging is not working either.... Any help? PLEASE!!!!

My MacBookPro is continuously buzzing, the backlights are not working although it should be on. Tried to cover the sensor, but it's not that. Also, it's telling me that I have no batteries and the charging is not working either.... Any help? PLEASE!!!!

Intel-based Macs: Resetting the System Management Controller (SMC)

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