Here’s the maintenance and service guide for your laptop, taken from this webpage
Go to p.34-40 to view the necessary steps and then the procedure to remove the keyboard/top cover assembly and the touchpad.
Check what has happened to the bracket that is holding the touchpad and also check the touchpad cable connections etc
Be aware of the following note on p.34 when you start to dis-assemble the laptop and then re-assemble it afterwards:
“There are as many as 55 screws that must be removed, replaced, and/or loosened when servicing Authorized Service Provider only parts. Make special note of each screw size and location during removal and replacement.”.
The manual also contains the part numbers for all the components, so if a part needs replacing,search online using the part number only, in the search term of your browser, to get results for suppliers