1, if the phone is now without electricity, you need to use the original charger to charge for 30 minutes and then start to try.
2, if the power is sufficient, please try to enter the engineering mode to clean the cache and then restart the try. Clearing the cache method: When the phone is turned off, hold down the power button and the volume reduction button at the same time, enter the engineering mode, select the clearing cache option through the volume key, the system will automatically clear the cache. After clearing the cache, select Restart to check whether the system can boot normally. If you cannot enter the engineering mode, it is recommended that you take your mobile phone, warranty card and invoice to the local customer service center, and the staff will check the mobile phone.
failure cause
①, the electronic control booth movement button does not respond, first of all, check whether the limit switch inside the booth 2 movement is in poor contact.
(2) If the limit switch is normal after the above inspection, the key detection is to decode the main parameters related to the circuit and find the fault point.