Fan, SSD card and Bluetooth board have separate guides; the all-digital console has no optical-drive repair job.
What to check before buying
Storage
iFixit lists an SSD-card guide for the Series S. A storage fault is different from a console that merely needs external expansion.
Wireless and cooling
The Bluetooth board and fan have separate procedures. This model does not use a disc drive, so disc-related Series X advice does not apply.