It's the South Bridge, not the Blue Bridge.
South bridge replacement is about 300. If you are insured, don't go to the factory for after-sales, which is expensive. Volunteer to answer all kinds of notebook hardware problems, directly click on Baidu hi for online consultation and leave a message, or click on my personal information website for online QQ or telephone consultation.
You can ask me to repair it in Beijing, and other cities can find a reliable maintenance point to repair it.