Lenovo B40-30 All-in-One - Manual (Page 27)

Chapter 7. Replacing hardware
Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety information”
in the Safety and Warranty Guide that was included with your computer. To obtain copies of the Safety and Warranty
Guide, go to the Support Web site at: http://consumersupport.lenovo.com.
Note: Use only parts provided by Lenovo.
General information
Pre-disassembly instructions
Before starting the disassembly procedure, make sure that you do the following:
1. Turn off the power to the system and all peripherals.
2. Unplug all power and signal cables from the computer.
3. Place the system on a flat, stable surface.
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