Dell OptiPlex 7490 All-In-One - Major components of your computer

Major components of your computer
1. Stand
2. Bottom cover
3. Heat sink
4. Processor fan
5. Processor
6. Memory module
7. M.2 2230/2280 solid-state drive
8. Rear-I/O bracket
9. Side-I/O board
10. Speakers
11. Audio board
12. Display panel
13. Display-assembly base
14. Middle frame
15. Camera-assembly door
16. Power-supply unit (PSU)
17. System board
18. System-board shield
19. Camera assembly
20. Wireless card
21. PSU fan
12
Removing and installing components