Aspire One D255 Series_SG - Acer Support

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Hot Keys The computer employs hotkeys or key combinations to access most of the computer's controls like screen brightness and volume output. To activate hotkeys, press and hold the key before pressing the other key in the hotkey combination. Hotkey Icon Function Description + Communication key Enables/disables the computer’s communication devices. (Communication devices may vary by configuration.) + Sleep Puts the computer in Sleep mode. + Display toggle Switches display output between the display screen, external monitor (if connected) and both. + Screen blank Turns the display screen backlight off to save power. Press any key to return. + TouchPad toggle Turns the internal TouchPad on and off. + Speaker toggle Turns the speakers on and off. + Num Lock When Num Lock is on, the embedded keypad is in numeric mode. The keys function as a calculator (complete with the arithmetic operators +, -, *, and /). Use this mode when you need to do a lot of numeric data entry. A better solution would be to connect an external keypad. + only for certain models. + Scroll Lock When Scroll Lock is on, the screen moves one line up or down when you press the up or down arrow keys respectively. Scroll Lock does not work with some applications. + < > Brightness up Increases the screen brightness. + < > Brightness down Decreases the screen brightness. + < > Volume up Increases the sound volume. + < > Volume down Decreases the sound volume. 14 Chapter 1
Using the communication key Here you can enable and disable the various wireless connectivity devices on your computer. Press + to bring up the Launch Manager window panel. A red toggle indicates the device is off. Click On to enable wireless/3G/Bluetooth connection. Click Off to disable connection. NOTE: Communication devices may vary by model. Special Key Locate the Euro symbol and the US dollar sign at the upper-center and/or bottom-right of your keyboard. The Euro symbol 1. Open a text editor or word processor. 2. Hold and then press the key at the upper-center of the keyboard. NOTE: Some fonts and software do not support the Euro symbol. The US dollar sign 1. Open a text editor or word processor. 2. Hold and then press the key at the upper-center of the keyboard. NOTE: This function varies according to the language settings. Chapter 1 15
Page 1 and 2: Aspire One D255 Series Service Guid
Page 3 and 4: Copyright Copyright © 2010 by Acer
Page 5: Preface Before using this informati
Page 8 and 9: Table of Contents VIII Removing the
Page 10 and 11: Table of Contents X
Page 12 and 13: Color options Display • Aquamarin
Page 14 and 15: Software • Productivity • Acer
Page 16 and 17: DDR3 Thermal Sensor EMC1402 MINI Ca
Page 18 and 19: Closed Front View # Component Icon
Page 20 and 21: Bottom View 1 2 # Component Icon De
Page 22 and 23: Using the Keyboard The Acer Aspire
Page 26 and 27: Hardware Specifications and Configu
Page 28 and 29: Video Interface Item Specification
Page 30 and 31: Hard Disk Drive Interface Vendor &
Page 32 and 33: LCD Display Supported Resolution Re
Page 34 and 35: I/O Ports Item Specification I/O su
Page 36 and 37: 26 Chapter 1
Page 38 and 39: Information The Information screen
Page 40 and 41: Security The Security screen contai
Page 42 and 43: Changing a Password 1. Use the ↑
Page 44 and 45: Exit The Exit screen allows you to
Page 46 and 47: DOS Flash Utility Perform the follo
Page 48 and 49: WinFlash Utility Perform the follow
Page 50 and 51: Removing BIOS Passwords: To clear t
Page 52 and 53: Example 1: Read DMI Information fro
Page 54 and 55: Creating a USB Flash Crisis Disk 1.
Page 56 and 57: General Information Pre-disassembly
Page 58 and 59: Removing the Battery Pack 1. Turn c
Page 60 and 61: Removing the 3G Card 1. See “Remo
Page 62 and 63: 5. Unlock the FPC. 6. Remove the FP
Page 64 and 65: 4. Turn the computer over and remov
Page 66 and 67: 5. Remove the four (4) screws, two
Page 68 and 69: 4. Remove the 3G module from the 3G
Page 70 and 71: Main Unit Disassembly Process Main
Page 72 and 73: 4. Remove the four (4) remaining sc
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8. Use a plastic tool to unlock the
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5. Remove the two (2) screws securi
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Removing the Bluetooth Module 1. Se
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5. Remove the four (4) screws from
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5. Disconnect the DC-In cable from
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NOTE: Circuit boards >10 cm² have
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8. Remove the LCD module from the c
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Removing the LCD Bezel 1. See “Re
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Removing the LCD Panel 1. CAUTION:
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7. Remove the camera cable from the
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Removing the LCD Brackets 1. See
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5. Remove the left 3G antenna. 6. R
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4. Replace the adhesive foam paddin
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Replacing Microphone Module 1. Adhe
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3. Place the LCD panel onto the LCD
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2. Press down around the entire per
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3. Place the right antenna cables u
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Replacing the Thermal Module IMPORT
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3. Replace the two (2) screws to se
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9. Adhere the LVDS cable to the adh
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Replacing the RTC Battery 1. Place
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Replacing the Button Board 1. Place
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Replacing the Upper Cover 1. Place
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5. Connect and lock the LED FFC to
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Replacing the 3G Module 1. Push the
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4. Push the HDD module forward to e
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2. Secure the lower cover to the ch
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Replacing the SD Dummy Card 1. Inse
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124 Chapter 3
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Power On Issue If the system doesn
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Abnormal Video Display If video dis
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Touch Pad Failure If the TouchPad d
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Internal Microphone Failure If the
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USB Failure If the USB fails, perfo
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Cosmetic Failure If an external com
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13. If the Issue is still not resol
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Post Codes Sec: These tables descri
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Each PEIM entry point used in 80_PO
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Code Description 0x72 MONITER_KEY 0
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146 Chapter 4
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Mainboard Bottom View (DDR3 Model)
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BIOS Recovery by Crisis Disk BIOS R
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Exploded Diagrams Main Assembly 1 2
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Logic Upper Assembly 1 2 No. Descri
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Aspire D255 FRU List Category ADAPT
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Category Description P/N LOWER CASE
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Category Description P/N Keyboard A
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Category Description P/N ANTENNA WL
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Category Description P/N LCD BEZEL
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Category Description P/N LCD BRACKE
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Category Description P/N ANTENNA 3G
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Category Description P/N LED LCD AU
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MAINBOARD Category Description P/N
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Category Description P/N LCD GASKET
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Model Definition and Configuration
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Model RO Country Acer Part No Descr
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Model Country Acer Part No BOM Name
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Model Country Acer Part No Memory 1
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Model Country Acer Part No Wireless
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Test Compatible Components Microsof
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Vendor Type Description P/N WD N320
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Online Support Information Appendix
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A B C D E F Antennas Removing 89 Ba
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Aspire One D255 Series_SG - Acer Support

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