b) Connect your device with a TCL official power adapter, then try again.
c) Verify whether there are any third-party power management software apps downloaded. If so, please uninstall them.
d) Try to reset or update your device. (Refer to Q How can I perform a factory reset on my laptop & Q How can I upgrade my device).
If the previously described options do not help, you can contact our hotline or repair center to get more professional technical assistance. Find the hotline or repair center information from the TCL website.