Lenovo z90-30 has a hole in the top. Why? The mobile phone crashed. I thought that hole was reopened. Later I learned that it was noise-reducing wheat.

When the equipment is in use, it is usually okay to poke it. If you are worried about anything, you can go to the after-sales store for further testing in time.

In addition, for the crash, you can try to hold down the power button again. If it can't be improved, go to the after-sales store for further inspection and maintenance. If it can be improved, then:

1, compare after uninstalling the latest downloaded suspicious program;

2. Try again after the fuselage is unloaded with unnecessary procedures;

3. Go to the safety of the fuselage and open the software for observation.

4. Back up the fuselage data to avoid data loss and restore the factory setting operation;

After the above operation, the problem remains. It is suggested that you can go to the after-sales store in time for further inspection and maintenance.

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