Acer Aspire M3900 инструкция обслуживания

Acer Aspire M3900 Service Guide PRINTED IN T AIW AN[...]

ii Revision History Please refer to the table below for the updates ma de on this service guide. Date Chapter Up dates[...]

iii Copyright Copyright © 2010 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any lan guage or computer languag e, in any form or by any means, electronic, mechanical, magne tic, optical, chemi cal, manual or otherwise, without the[...]

iv Disclaimer The information in this guide is subject to ch ange without notice. Acer Incorporated makes no representations or warranties, either e xpressed or implied, w ith respect to th e contents hereof and specifically disclaims any warrantie s of merchantability or fitnes s for any particular purpose. Any Acer Incorporated software described[...]

v Conventions The following conventi ons are used in this manual: SCREEN MESSAGES Denotes actual messages that appear on screen. NOTE Gives additional informa ti on rela ted to the current topic. W ARNING Alerts you to any physical risk or system damage that might result from doing or not doing specific actions. CAUTION Gives precautionary me asure[...]

vi Service Guide Coverage This Service Guide provides you with all technica l information relating to the BASIC CONFIGURA TION decided for Acer's "glo bal" product offering. T o better fit local market requirements and enhance produ ct competitiveness, your regional office MA Y have decided to extend the func tionality of a machine ([...]

vii System Tour 1 Features 1 Block Diagram 5 System Compo nents 6 Front Panel 6 Rear Panel 7 Hardware Specifications and Configurations 8 Power Management Function( ACPI support function) 11 System Utilities 12 CMOS Setup Utility 12 Entering CMOS setup 12 Navigating Through the Setup Utility 12 Setup Utility Menus 14 System Disassembly 27 Disassemb[...]

viii FRU (Field Replaceable Unit) List 68 Aspire M3900 Exploded Diagram(AM350-ASSY) 69 Aspire M3900 Exploded Diagram(AM351-ASSY) 70 Aspire M3900 FRU List 71[...]

Chapter 1 1 Features Below is a brief summary of the computer ’s many feature: NOTE: The features listed in this section is for your re ference only . The exact conf igura tion of the system depends on the mo del purchased. Operating System • Microso f t W i ndo w s W ind o ws 7 H o me Pr e m i um x64 x86 • Microso f t W i ndo w s W ind o ws [...]

2 Chapter 1 • 1GB / 2GB DDR III 800/1066/1333 Un-buffered Non-ECC DIMM support • 1GB to 8GB Max memory support • Design Criteria: • Should meet Intel G45/G43 Express Chipset platform design guide • Dual channel should be enable d always when plug-in 2 same memory size DDR III memory module Hard disk • Support up to two SA T A ports • [...]

Chapter 1 3 USB ports • Controller: Intel ICH10R • Ports Quantity: 12 • 4 back panel ports • On-board: Four 2*5 headers(8 po rts) • 4 ports for front daughter board • Connector Pin: standard Intel FPIO pin defi nition • Data transfer rate support : USB 2.0/ 1.1 Extension slot • PCI Express Slot T ype: x16 • PCI Express x16 Slot Qu[...]

4 Chapter 1 System BIOS • Ty p e : • Use SPI Flash • Size:2MB • Kernel:AMI Kernel with Acer skin Power supply • 500W/300W/250W in stable mode (Acer Assign System Power Unit) • Design for Intel G43 series chipset comp atible system • V oltage design should be covere d +5V , +3.3V , +12V , +5VSB, -12V (attention to 12V output capability[...]

Chapter 1 5 Block Diagram[...]

6 Chapter 1 System Components This section is a virtual tour of th e sy stem’s interior and exterior components. Front Panel No. Component 1 USB 2.0 ports 2 Master optical drive bay door 3 Slave bay door(Optical drive bay for AM350 bezel, Removable HDD bay for AM351 bezel) 4X D s l o t 5 Memory S tick / Micro Secure Digital 6 CF I/II (Comp actFla[...]

Chapter 1 7 Rear Panel No. Component 1 Power connector 2 PS2 keyboard port 3V G A p o r t 4 HDMI port 5 USB 2.0 ports 6 Side Surround jack 7 Line-out jack 8 Microphone/speaker-out/line-in jack 9 Expansion slot (graphics card and TV tuner card and Mode card) 10 Center speaker/subwoofer jack 1 1 Surround rear L/R 12 Line-in jack 13 USB 2.0 ports 14 R[...]

8 Chapter 1 Hardware Specifications and Configurations Processor BIOS IOS Hotkey List Main Board Major Chips Item Sp ecification Processor T ype CPUs which complaint with Intel FSB 800/1066/1333 MHz CPUs Socket T ype Intel Socket T LGA 1 156 pin Minimum operating speed 0 MHz (If S top CPU Clock in Sleep St ate in BIOS Setup is set to Enabled.) Item[...]

Chapter 1 9 Memory Combinations System Memory Audio Interface Slot Memory T ot al Memory Slot 1 1GB,2GB 1G ~2GB Slot 2 1GB,2GB 1G ~2GB Slot 3 1GB,2GB 1G ~2GB Slot 4 1GB,2GB 1G ~2GB Maximum System Memo ry Supported 1G~8GB Item Specification Memory slot number 4 slot Support Memory size per socket 1GB/2GB Support memory type DDRIII Support memory int[...]

10 Chapter 1 SATA Interface USB Port Environmental Requirements Power Management • Devices wake up from S3 should be less than. • Devices wake up from S5 should be less than 10 seconds. Item Sp ecification SA T A controller Intel ICH10 R SA T A controller resident bus PCI bus Number of SA T A channel SA T A X 6 Support bootable CD-ROM YES Item [...]

Chapter 1 11 Power Management Function(ACPI support function) Device Standby Mode • Independent power management ti me r for hard disk dr ive devices(0-15 minutes,time step=1minute). • Hard Disk drive goes into S tandby mode(for A T A standard interface). • Disable V -sync to control the VESA DPMS monitor . • Resume method:device activated [...]

Chapter 2 12 CMOS Setup Utility CMOS setup is a hardware configurat ion program built into the system ROM, called the complementary meta l- oxide semiconductor (CMOS) Setup Utility . Since mo st systems are already properly configured and optimized, there is no need to run this util ity . Y ou will need to run this utility under the follo wing cond[...]

13 Chapter 2 Entering CMOS setup 1. T urn on the server and the monitor . If the server i s already turned o n, close all open app lications, then restart the server . 2. During POST , press Delete . If you fail to press Delete before POST is completed, you will need to re start the serve r . The Setup Main menu will be d isplayed showing the Setu [...]

Chapter 2 14 Setup Utility Menus The Setup Main menu includes the following main setup categories. In the descrip ti ve t able foll owi n g ea ch of th e me nu s cre en sh ot s, settings in boldface are the default and suggested settings. Parameter Description Product Information This page shows the relevant information of the main board S tandard [...]

15 Chapter 2 Product Information The Product Information menu disp lays basic information about the syst em. These entries are for your reference only and are not user-configurable. Parameter Description Processor T y pe T ype of CPU installed on the syst em. Processor S peed S peed of the CPU installed on the system. System Memory T otal size of s[...]

Chapter 2 16 Standard CMOS Features Parameter Description Option System Date Set the date following the weekday-month-day-year format. System T ime Set the system time following the hour-minute-second format. Halt On Determines whether the system will stop for an error during the POST . All, But Keyboard No Errors All Errors[...]

17 Chapter 2 Advanced BIOS Feature Parameter Description Option Quick Boot Allows you to decrease the time it takes to boot the computer by shortening or skipping certain st andard booting process. Enabled Disabled Quiet Boot When enabled, the BIOS splash screen displays during startup. When disabled, the diagnostic sc reen d isplays during startup[...]

Chapter 2 18 Advanced Chipset Features Parameter Description Option Intel EIST When enabled, this feature allows the OS to r educe power consumption. When disabled, the system operates at maximum CPU speed. Enabled Disabled Intel XD Bit When enabled, the processor disables code execution when a worm attempts to insert a code in the buffer preventin[...]

19 Chapter 2 Integrated Peripherals Parameter Description Option Onboard SA T A Controller Enables or disables the onboard SA T A controller. Enabled Disabled Onboard SA T A Mode Select an operating mode for the onboard SA T A. RAID Native IDE Onboard USB Controller Enables or di sables the onboard USB controller . Enabled Disabled Legacy USB Suppo[...]

Chapter 2 20 Power Management Setup Parameter Description Option ACPI Suspend Mode Select an ACPI state. S3 (STR) S1 (POS) Deep power off mode Select the Deep power off Mode Enabled Disabled Power On by RTC Alarm Enables or Disables to wake up the system by RTC Alarm Function Enabled Disabled Power On by PCIE Devices Enables or disables to wake up [...]

21 Chapter 2 PC Health Status Parameter Description Option Smart F AN Enables or disables the smart system fan control function. Enabled Disabled[...]

Chapter 2 22 Frequency/Voltage Control Parameter Description Option Clock to All DIMM/PCI Enables or disabl es control the clock to all DIMM/PCI Enabled Disabled S pread S pectrum Enables or disables the reduction of the mainboard’s EMI. Note: Remember to disable the Spread S pectrum feature if you are overclocking. A slight jitter can introduce [...]

23 Chapter 2 BIOS Security Features Setting a supervisor pass word 1. Use the up/down arrow keys to select Chan ge Supervisor Pa sswor d menu then press Enter . A password box will appear . 2. T ype a password then press Enter . The password may consist up to six al phanumeric characters (A-Z, a-z, 0-9) 3. Retype the password to verify the first en[...]

Chapter 2 24 Load Default Settings The Load Default Settings menu allows you to lo ad the defau lt settings for all BIOS setup parameters. Setup defaults are quite demanding in terms of resources cons umption. If you are using low-speed memory chips or other kinds of low-performance co mponents and you choose to load these settings , the system mig[...]

25 Chapter 2 Save & Exit Setup The Save & Exit Setup me nu all ows you to save cha nges made and close the Setup Utility .[...]

Chapter 2 26 Exit Without Saving The Exit Without Saving menu allows you to disca rd changes made and close the Setup Utility .[...]

Chapter 3 27 This chapter contains step-by-step procedure s on how to disassemble the desktop computer for ma intenance and troubleshooting. Disassembly Requirements T o disassembl e the computer , you need the following tools: • Wrist grounding strap and conductive mat for preventing electrostatic discharge • Flat-blade screwdriver • Philips[...]

28 Chapter 3 Pre-disassembly Procedure Before proceeding with the disassembly procedure, perform the steps listed below: 1. T urn off the system and all the peripherals connected to it. 2. Unplug the power cord from the power ou tl ets. 3. Unplug the power cord from the system. 4. Unplug all peripheral cables from the system. 5. Place the system un[...]

Chapter 3 29 Removing the Side Panel 1. Remove the two screws located on the rear edge of the side panel. 2. Slide the side panel toward the back of the cha ssis until the tabs on the cover disengage with the slots on the chassis. 3. Lift the side panel away from the server and put it aside for reinstallation later .[...]

30 Chapter 3 Removing the Heat Sink Fan Assembly W ARNING: The heat sin k becomes very hot when the system is on. NEVER touch the heat sink with any metal or with your hands. 1. Use a long-nosed screwdriver to lo osen the four screws on the heat sink, in the order as shown below . 2. Lift the heat sink fan assemb ly away from the mainboard.[...]

Chapter 3 31 3. Lay down the heat sink fan assembly , in an upright po sition, on top of the optica l drive, as shown be low , then disconnect the fan cable from the mainboard . 4. Remove the heat sink fan assembly from the chassi s then lay it down in an upright position—with the thermal patch facing upward. Do not let the thermal patch on the h[...]

32 Chapter 3 Removing the Processor IMPORT AN T : Before removing a processor from the mainboard, make sure to create a backup file of all import ant dat a . W ARNING: The processor becomes very hot when the system is on. Allow it to cool off first before handling . 1. Release the load lever (1). 2. Pull the load lever to the fully open, upri ght p[...]

Chapter 3 33 Removing the VGA Card 1. Remove the three screws that secures the card to the chassis. 2. Releasing PCI Latch. 3. Use a figer to press the clip,and t he same ti me Gently pull the card to remove it from the ma inb oard.[...]

34 Chapter 3 Removing the TV Card 1. Gently pull the TV card to remove it from the mainboard.[...]

Chapter 3 35 Removing the Mode Card 1. Gently pull the Mode card to remove it from the mainbo ard.[...]

36 Chapter 3 Removing the Memory Modules 1. Press the holding clips on both sides of the DIMM slot outward to release the DIMM (1). 2. Gently pull the DIMM upward to pu ll it away from the chassis (2).[...]

Chapter 3 37 Removing the Hard Disk Drive 1. Disconnect the data and power cables from the rear of the hard drive. 2. Disconnect the other end of the data cable from the mainboard . 3. Remove the HDD bracket a. Remove the screw that secures the chassis to the HDD bracket.[...]

38 Chapter 3 b. Lift the bracket up and turn it over . 4. Remove the HDD module a. Remove the eight screws secure the HDD module to the HDD bracke t. b. Slide the HDD out of the bracket.[...]

Chapter 3 39 Removing the USB Board of Rear Panel 1. Release these cable from Cable clip. 2. Disconnector the USB cable from the motherboard. 3. Remove the screw that secures the USB board bracket to the chassis.[...]

40 Chapter 3 4. Pull the USB board up and lift up from the chassis. 5. Remove the two screws that secure the USB board to the bracket. 6. Pull the USB board out of the bracket.[...]

Chapter 3 41 Removing the Front Bezel 1. Disconnect the LED cable. 2. Release the front bezel retention tabs from the chassis inte ri or .[...]

42 Chapter 3 3. Pull the bezel away from the chassis.[...]

Chapter 3 43 Removing the Optical Drive 1. Disconnect the data and power cables from the rear of the optical drive. 2. Disconnect the other end of the data cable from the mainboard . 3. Remove the two screws from the optical drive.[...]

44 Chapter 3 4. Pull the drive out of the drive bay . NOTE: If the bay load to be optical drive,disassemb ly me thod is the same with master optical drive. If the bay load to be removable HDD,please refer to next page “Removing the Removable HDD”disassembly method.[...]

Chapter 3 45 Removing the Removable HDD 1. Gently push the drive block key rightwa rd,then open the door . 2. Slide the removable HDD tray out of the removable HDD bracket.[...]

46 Chapter 3 3. Remove the HDD module a. Use a hand to open out the removable HDD tray until the hook of HDD bracket away from the HDD screw bore. then use other hand to take out the HDD module. 4. Remove the removable HDD bracket. a. Disconnect the data cable from the mainboard. b. Disconnect th e po w e r cab l e.[...]

Chapter 3 47 c. Remove the two screws that secures t he removable HDD bracket to the chassis. d. Remove the removable HDD out of the chassis.[...]

48 Chapter 3 Removing the Power Supply 1. Disconnect the 24-pin an d 4-pin power supply ca bles from the mainboard . 2. Remove the four screw that secure s the power supply to the chassis.[...]

Chapter 3 49 3. Lift the power supply module out of the chassis.[...]

50 Chapter 3 Removing the Card Reader 1. Open the cable retenti on clip . 2. Disconnector the card reader cable from th e motherboard. 3. Remove the screw that secures th e card re ad e r to th e ch ass is.[...]

Chapter 3 51 4. Pull the card reader out of chassis.[...]

26 Removing the Mainboard 1. Disconnect the power switch, top USB, a nd top audio cables from the mainboard. 2. Remove the eight screws that secu re the ma inboard to the chassis. Note: Circuit boards >10 cm² has been hi ghlighted with the yellow rectangle as above image shows. Please detach the Circuit boards and foll ow local regulations for [...]

Chapter 3 53 3. Lift the board from the chassis. Note: Circuit boa rds >10 cm² has been h ighlighted with the yellow rectangle as above image shows. Please detach the Ci rcuit boards and fol low local regul ations for disposal . 4. Punching in IO Shield then you can remove it. 5. Remove the RTC battery . Note : RTC battery has been highlighted [...]

Chapter 4 54 This chapter provides instructions on how to trouble shoot system hardw are problems. Hardware Diagnostic Procedure IMPORT AN T : The d iagnostic tests described in this chapter ar e o nly intended to test Acer p roducts. Non-Acer products, prototype cards, or modified opti ons can give false errors and inval id system responses. 1. Ob[...]

55 Chapter 4 System Check Procedures Power System Check If the system will power on, skip this sect ion. Refer to System External In spection. If the system will not power on, do the fol lowing: • Check if the power cable is properly co nnected to the system and AC source. • Check if the voltage selector switchis set to the correct volt age set[...]

Chapter 4 56 Beep Codes Beep codes are used by the BIOS to indicate a seriou s or fatal error to the end user . Beep codes are used when an error occurs before the system video ha s b een initialized. Beep c odes will be generated by the system board speaker , commonly referred to as the PC speaker . AMIBIOS displays the checkpoi nts in the bottom [...]

57 Chapter 4 Checkpoints A checkpoint is either a byte or word value output to I/O port 80h.The BIOS outputs checkp oints throughout bootblock and Power-On Self T est (POST) to indicate th e task the system is currently executing. Checkpoint sare very useful in aiding software developers or te chnicians in debug ging problems that occur during the [...]

Chapter 4 58 DA Restore CPUID value back into register . Give control to BIOS POST (ExecutePOSTKernel). See POST Code Checkpoints section of document for more information. DC System is waking from ACPI S3 st ate. E1-E8 EC- EE OEM memory detection/configuration error . Th is range is reserve d fo r chipset vendors & system manufacturers. The er [...]

59 Chapter 4 Bootblock Recover y Code Checkpoints The Bootblock recovery code gets control when the BIOS determines that a BIOS recovery needs to occur because the user has forced the upda te or the BIOS checksum is corrupt . The following table des cribes the type of checkpoints that may occur during th e Bootblock recovery portion of the BIOS. NO[...]

Chapter 4 60 BIOS Recovery 1. This function only effects when the BIOS BootBlock section is healthy . 2. Allow to execute recovery function media: FDD / USB storage / ODD. 3. The recovery media to support Boot fu nction is unnecessary . 4. Recovery step as follow: 4-1. Copy the latest BIOS ROM file to th e root directory of recovery media. 4-2. Ren[...]

Chapter 5 61 M/B Placement Jumper and Connector Information Chapter 5[...]

62 Chapter 5 No Label Description No Label Description 1 CPU Socket "CONN,Socket,IntelPres cottCPU,LGA- 775P ,10u,G ,SMD" 1 1 1394A1 Onboard 1394a header 2 CPU_F AN CPU fan power header 12 SPDIF_OUT1 ~2 SPDIF out header 3 DIMM1~4 "CONN,DIMM,DDRIII,1. 5V ,V/T ,Blu,15u,G ,DIP- 240" 13 F_AUDIO Front panel audio header 4 GPIO1~2 Gen[...]

Chapter 5 63 Jumper Setting The section explains how to set jumper fo r correct configuration of the mainboard. Setting Jumper Use the motherboard jumpers to set system config uration options. Jump ers with more Than one pin are numbered. When setting the jumpers, ensure th at the jump er caps are Placed on the correct pins. Internal header pin def[...]

64 Chapter 5 FRONT USB HEADER 1: USBVCC_1 2: USBVCC_1 3: USB0_XN 4: USB1_XN 5: USB0_XP 6: USB1_XP 7:GND 8: GND 9: KEY 10: GND FRONT USB HEADER 1: USBVCC_2 2: USBVCC_2 3: USB2_XN 4: USB4_XN 5: USB2_XP 6: USB4_XP 7:GND 8: GND 9: KEY 10: GND FRONT AUDIO HEADER 1: POR T -F_L 2: AUGND 3: PORT -F_R 4: FRONT_AUD_DET 5: PORT -E_R 6: MIC2_JD 7: AUGND 8: KEY[...]

Chapter 5 65 Connector pin definition Connector Name Functio n Definition PSKBMS CONN 1: KBDA T A 2: NC 3: GND 4: KBVCCSB 5: KBCLK 6: NC 7: MSDA T A 8: NC 9: GND 10: KBVCCSB 11 : M S C L K 12: NC 13: GND 14: GND 15: GND 16: GND 17: GND VGA CONN 1: RED 2: GREEN 3: BLUE 4,1 1: NC 9: HDMIVCC 12: VDAC_SDA T 13: HSYNC 14: VSYNC 15: VDAC_SCLK 5,6,7,8,10,[...]

66 Chapter 5 SA T A CONN 1: GND 2: SA T A1_TX_P 3: SA T A1_TX_N 4: GND 5: SA T A1_RX_N 6: SA T A1_RX_P 7: GND SA T A CONN 1: GND 2: SA T A2_TX_P 3: SA T A2_TX_N 4: GND 5: SA T A2_RX_N 6: SA T A2_RX_P 7: GND SA T A CONN 1: GND 2: SA T A3_TX_P 3: SA T A3_TX_N 4: GND 5: SA T A3_RX_N 6: SA T A3_RX_P 7: GND A TX_POWER CONN 1:VCC3 13:VCC3 2:VCC3 14:-12V [...]

Chapter 5 67 A TX12V CONN 1: GND 2: GND 3: +12V_4P 4: +12V_4P Connector Name Functio n Definition[...]

chapter 6 68 This chapter offers the FRU (Field Replaceable Unit) lis t in glob al config uration of the Aspire M3900 desktop computer . Refer to this chapter w hen ever orderin g the part s to repair or for RMA (Return Merchandise Authorization). NOTES: • When ordering FR U parts, check the most up-to-dat e information availa ble on your region [...]

69 Chapter 6 Aspire M3900 Exploded Diagram(AM350-ASSY) NOTE: This section will be update d when more information becomes availab le. ITEM NAME Q’TY ITEM NAME Q’TY 1 CHASSIS ASM 1 4 HDD BRACKET 1 2T O P - C O V E R 15S I D E C O V E R 1 3 FRONT BEZEL 1 6 POWER 1[...]

Chapter 6 70 Aspire M3900 Exploded Diagram(AM351-ASSY) NOTE: This section will be update d when more information becomes availab le. ITEM NAME Q’TY ITEM NAME Q’TY 1 CHASSIS ASM 1 5 HDD BRACKET 1 2T O P - C O V E R 16S I D E C O V E R 1 3 REMOV ABLE HDD BRACKET 1 7 POW ER 1 4 FRONT BEZEL[...]

71 Chapter 6 Aspire M3900 FRU List Components Model Name or Key Spec. Acer P/N MB Kit MB Kit HimalayanII Intel G43 ICH10R GMA X4500 384M Intel Boazman 82567V PCI-E Giga LAN A TX W/ 1394 V1.0 LF w/i EuP Lot6, w/o DolbyIII MB.SEE07.002 Chassis Hon Hai Chassis MicroA TX HM090G with front USB 4 port for Aspire AM350 bezel HS.13100.1 16 Hon Hai Chassis [...]

Chapter 6 72 PFC 250W (30L) EuP PY .25008.036 PFC 250W (30L) EuP PY .2500F .004 Non-PFC 300W (30L) EuP PY .3000B.015 Non-PFC 300W (30L) EuP PY .30008.032 FR 300W (30L) EuP 82+ PY .30009.019 FR 300W (30L) EuP 82+ PY .30008.033 CPU "Core 2 Quad Q9550 (2.83G 12M 1333FSB), 95W , E0" KC.95501.QQE "Core 2 Quad Q9400 (2.66G 6M 1333FSB) , 95[...]

73 Chapter 6 75.073C1.G02 LF 128*8 0.065um KN.1GB01.031 75.A73C1.G02 LF 128*8 0.065um KN.2GB01.025 HDD 500 KH.50007.012 640 KH.64007.002 1T KH.01K07.003 500 KH.50001.012 1T KH.01K01.007 1.5TB KH.15K01.002 500 KH.50008.014 640 KH.64008.003 1T (5400 RPM) KH.01K08.005 1.5T(5400RPM) KH.15K08.001 DVD-ROM DH-16D5S Win7 KV .0160F .002 DH-20N(H/F) Win7 KV [...]

Chapter 6 74 GEFORCE 310 512MB DDR2 SAMSUNG (64BITS) VGA DVI HDMI A TX BRACKET ROHS VG .PCPT3.101 GEFORCE 310 512MB DDR2 HYNIX (64BITS) VGA DVI HDMI A TX BRACKET ROHS VG .PCPT3.102 HD5570 1GB DDR 3 (128BITS) SAMSUNG DVI HDMI VGA W/A TX BKT ROHS VG .APC55.701 HD5450 512MB SDDR 3 (64BITS) SAMSUNG DVI HDMI VGA W/ A TX BKT ROHS VG .APC54.501 TV -Tuner [...]

75 Chapter 6 Keyboard CHICONY KU-0760 USB S tandard 104KS Black US w/o eKey KB.USB03.192 Keyboard CHICONY KU-0760 USB S tandard 104KS Black US w/o eKey KB.USB03.31 1 Keyboard LITE-ON SK-9625 USB St andard 104KS Black US w/o eKey KB.USB0B.158 Keyboard LITE-ON SK-9625 USB St andard 104KS Black US w/o eKey KB.USB0B.202 Components Model Name or Key Spe[...]