I'm sorry to delay your normal use, because there are certain risks in self-brushing. If you need to brush yourself, please carefully check the brush tutorial.

According to what you said, it is not ruled out that it is caused by computer system problems or wrong steps. If you are willing to take possible risks, I personally suggest that you refer to the following links of A308T models:

/Lenovo/WSI/station/service station/default . aspx？ intcmp=MIDH

The business hours of maintenance stations are generally from 9:00- 18:00 from Monday to Sunday, and each station will adjust slightly according to its own operation. I suggest you call for detailed consultation before you go. Please refer to.

Thank you for your support to Lenovo and wish you a happy life!