Switch off the system; remove the battery, ac adapter and the power cable. Press and hold down the power button for thirty seconds to drain any excess power and then check system is working. In case system is not working, You can try one more step when the laptop is on please remove the ac adapter and the battery so system will shut down completely after a while put back the battery and the power adapter and check the system is working fine.
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Thanks and regards, Senthil S #iworkfordell. To know more about Dell Product Support, Drivers & Downloads, Order & Dispatch status -> choose your region US / India . For Dell support videos clickhere.