Hi,
Here’s a link to the [https://download.lenovo.com/consumer/mobiles_pub/ideapad_flex4_1470_1570_1435_1480_1580_hmm_201609.pdf|service manual] for your IdeaPad.
It details the necessary pre-requisite steps and then the procedures to dis-assemble the laptop to remove the relevant faulty parts. (if any).
Scroll down to p.65 to view an exploded view of all the parts followed by the parts list.
If you need a new part, simply find the appropriate part number from the list and search online using the part number ''only'' in your browser’s search box to find suppliers of the parts.
Here is a link to the ifixit [[Topic:Lenovo IdeaPad Flex 4-1470]] guide which may also be of some help.