User ManualTable of ContentsAspire 4253/4253G Service Guide1Table of Contents5Chapter 1: Hardware Specifications11Table of Contents12Features15Operating System15Platform15System Memory15Display15Audio Subsystem15Graphics16Storage Subsystem16Privacy Control16Optical Media Drive17Communication17Dimension and Weight17Power Adapter and Battery17Special Keys and Controls18I/O Ports18Optional Items18Warranty18Environment18Software19Notebook Tour20Touchpad Basics27Using the Keyboard28Windows Keys29Hotkeys30Specification Tables33Computer specifications33Processor34CPU Fan True Value Table)35GPU Fan True Value Table)35System Memory35Video Interface36BIOS36Keyboard37Hard Disk Drive (AVL components)38Hard Disk Drive (AVL components) (Continued)39Hard Disk Drive (AVL components) (Continued)40LCD Inverter (not available with this model)44Display Supported Resolution (LCD Supported Resolution)45Display Supported Resolution (GPU Supported Resolution)453G Card (not available in this model)47Audio Interface49Battery49VRAM49AC Adapter50Card Reader51System DMA Specification52Chapter 2: System Utilities57Table of Contents58BIOS Setup Utility59Navigating the BIOS Utility59BIOS60Information60Main62Security64Boot68Exit69BIOS Flash Utilities70DOS Flash Utility71WinFlash Utility73Clearing BIOS Passwords74Removing BIOS Passwords75Miscellaneous Tools77Using DMITools77Using the LAN MAC EEPROM Utility81Crisis Disk Recovery82Chapter 3: Machine Maintenance Procedures85Table of Contents86Introduction89General Information89Recommended Equipment89Maintenance Flowchart90Getting Started91Battery Pack Removal92Battery Pack Installation92Dummy Card Removal93Dummy Card Installation93Keyboard Removal94Keyboard Installation95ODD (Optical Disk Drive) Module Removal96ODD Module Installation97Lower Cover Removal98Lower Cover Installation99DIMM (Dual In-line Memory Module) Module Removal100DIMM Module Installation101WLAN (Wireless Local Area Network) Module Removal102WLAN Module Installation103USB Module Removal104USB Module Installation104RTC Battery Removal105RTC Battery Installation105Bluetooth Module Removal106Bluetooth Module Installation107Thermal Module Removal108Thermal Module Installation109HDD (Hard Disk Drive) Module Removal111HDD Module Installation112Mainboard Removal113Mainboard Installation114LCD (Liquid Crystal Display) Module Removal115LCD Module Installation116Speaker Removal117Speaker Installation118LCD Bezel Removal119LCD Bezel Installation120Camera Module Removal121Camera Module Installation122LCD Panel Removal123LCD Panel Installation124LCD Bracket Removal125LCD Bracket Installation125LVDS Cable Removal126LVDS Cable Installation127WLAN Antenna Removal128WLAN Antenna Installation128Chapter 4: Troubleshooting129Table of Contents130Introduction131General Information131Power On Issues132No Display Issues133LCD Failure135Keyboard Failure136Touchpad Failure137Internal Speaker Failure138Microphone Failure140USB Failure141Other Functions Failure142Intermittent Problems143Undetermined Problems143Post Codes144Chapter 5: Jumper and Connector Locations151Table of Contents152Mainboard Jumper and Connector Locations153Clearing Password Check and BIOS Recovery155Clearing Password Check155Clear CMOS Jumper156BIOS Recovery by Crisis Disk156Chapter 6: FRU (Field Replaceable Unit) List159Table of Contents160Exploded Diagrams162FRU List165Screw List178Chapter 7: Model Definition and Configuration179Table of Contents180Acer 4255181Aspire 4253G202Chapter 8: Test Compatible Components213Table of Contents214Microsoft® Windows® 7 Environment Test216Chapter 9: Online Support Information223Table of Contents224Introduction225Size: 7.74 MBPages: 226Language: EnglishOpen manual