There are many repair points, but it is not recommended to find repair for the problem of yinw data damage, only after-sales service is recommended.

You should know that most storage and maintenance are pits, and you can make money without cost.

If you can't find it after sale, you can only further determine where your problem is. If it's not the end of life and sudden damage, but the data crash, you still have remedies. You can try it by brushing the firmware and lowering the standard.