Acer Aspire One D255 Series, Service Manual, Page: 56 / 272

46 Chapter 3
General Information
Pre-disassembly Instructions
Before proceeding with the disassembly procedure, make sure that you do the following:
1. Turn off the power to the system and all peripherals.
2. Unplug the AC adapter and all power and signal cables from the system.
3. Place the system on a flat, stable surface.
Disassembly Process
The disassembly process is divided into the following stages:
• External module disassembly
• Main unit disassembly
• LCD module disassembly
The flowcharts provided in the succeeding disassembly sections illustrate the entire disassembly sequence.
Observe the order of the sequence to avoid damage to any of the hardware components. For example, if you
want to remove the mainboard, you must first remove the keyboard, then disassemble the inside assembly
frame in that order.
Main Screw List
Screw Quantity Part Number
M2*7 12 86.SDE02.005
M2*3 16 86.SDE02.002
M3*3 Ni 8 86.SDE02.006
M2*5 7 86.SDE02.004
M2*3 (t=0.04) 2 86.SDE02.001
M2*4 Ni 2 86.SDE02.003