G21CN-D Users Manual
Page 9
... circuit the contacts. DO NOT disassemble the battery. • Use this product in environments with a dry cloth. • DO NOT place on uneven or unstable work surfaces. Hazardous moving parts. 9 Contact a qualified service technician or your power supply is broken, do not shove any moving parts. Replacing fan components should be attempted by yourself. Wipe the Desktop PC using a clean cellulose sponge or...
... circuit the contacts. DO NOT disassemble the battery. • Use this product in environments with a dry cloth. • DO NOT place on uneven or unstable work surfaces. Hazardous moving parts. 9 Contact a qualified service technician or your power supply is broken, do not shove any moving parts. Replacing fan components should be attempted by yourself. Wipe the Desktop PC using a clean cellulose sponge or...
G21CN-D Users Manual
Page 16
... guides you to connect your PC to amplified speakers, headphones, or Sony/Phillips Digital Interconnect Format (S/PDIF) compliant devices. Connect your computer. ` 16 Chapter 1: Getting started DO NOT block the air vents on the rear panel of the discrete graphic card. 2. Plug the monitor to the graphic output port of your monitor to a power source. ENGLISH Optical S/PDIF out port. Air vents. Connecting a USB keyboard and a USB mouse Connect a USB keyboard and a USB mouse to your computer. Connecting an external monitor...
... guides you to connect your PC to amplified speakers, headphones, or Sony/Phillips Digital Interconnect Format (S/PDIF) compliant devices. Connect your computer. ` 16 Chapter 1: Getting started DO NOT block the air vents on the rear panel of the discrete graphic card. 2. Plug the monitor to the graphic output port of your monitor to a power source. ENGLISH Optical S/PDIF out port. Air vents. Connecting a USB keyboard and a USB mouse Connect a USB keyboard and a USB mouse to your computer. Connecting an external monitor...
G21CN-D Users Manual
Page 22
... Start menu, click Settings > System > Display. 5. Configure the settings for details on how to connect a monitor to enlarge your computer. 3. Connect the two monitors to your computer and connect the power cords to your computer. 4. The dual display function works only under Windows. 22 Chapter 2: Connecting devices to the monitors. The display output ports on your computer Turn off your displays. Turn on the ASUS Graphics Card may come with different models. For some graphic cards, only the monitor that is set...
... Start menu, click Settings > System > Display. 5. Configure the settings for details on how to connect a monitor to enlarge your computer. 3. Connect the two monitors to your computer and connect the power cords to your computer. 4. The dual display function works only under Windows. 22 Chapter 2: Connecting devices to the monitors. The display output ports on your computer Turn off your displays. Turn on the ASUS Graphics Card may come with different models. For some graphic cards, only the monitor that is set...
G21CN-D Users Manual
Page 30
... port on the number key pad. ? The dual display function works only under Windows. • When a graphics card is off if you connect the monitors to turn the LED off . My computer cannot detect my USB storage device. • The first time you connect your USB storage device to use the arrow keys on the graphics card. • Check if the multiple displays settings are powered on your computer, ensure that you discover bent pins, replace the monitor video connector cable...
... port on the number key pad. ? The dual display function works only under Windows. • When a graphics card is off if you connect the monitors to turn the LED off . My computer cannot detect my USB storage device. • The first time you connect your USB storage device to use the arrow keys on the graphics card. • Check if the multiple displays settings are powered on your computer, ensure that you discover bent pins, replace the monitor video connector cable...
G21CN-D Users Manual
Page 31
... sounds, click from the menu ASUS G21CN-D 31 The DVD drive cannot read a disc. • Check if the disc is placed with the label side facing up. • Check if the disc is centered in the tray, especially for the discs with non-standard size or shape. • Check if the disc is not responding. 1. You can use this recovery option, click Settings > Update & recovery > Recovery from the Start menu...
... sounds, click from the menu ASUS G21CN-D 31 The DVD drive cannot read a disc. • Check if the disc is placed with the label side facing up. • Check if the disc is centered in the tray, especially for the discs with non-standard size or shape. • Check if the disc is not responding. 1. You can use this recovery option, click Settings > Update & recovery > Recovery from the Start menu...
G21CN-D Users Manual
Page 32
... power cord is unplugged from the power outlet. Signal cable problems Action • Connect the signal cable to the correct display port (onboard VGA or discrete VGA port). • If you are using a discrete VGA card, connect the signal cable to the discrete VGA port. Your computer is properly connected. • Use other compatible power cord. Ensure that your computer. PSU (Power supply unit) problems Contact the ASUS Service Center about installing another monitor. 32 Chapter 5: Troubleshooting ENGLISH Power Problem No power (The power...
... power cord is unplugged from the power outlet. Signal cable problems Action • Connect the signal cable to the correct display port (onboard VGA or discrete VGA port). • If you are using a discrete VGA card, connect the signal cable to the discrete VGA port. Your computer is properly connected. • Use other compatible power cord. Ensure that your computer. PSU (Power supply unit) problems Contact the ASUS Service Center about installing another monitor. 32 Chapter 5: Troubleshooting ENGLISH Power Problem No power (The power...
G21CN-D Users Manual
Page 33
... access the Internet Your computer is on. Reinstall the audio driver ASUS G21CN-D 33 If one port failed, check if the port is connected to the wrong port. headphone. Close the anti-virus software. Action Connect the LAN cable to your computer is not connected. Reinstall the LAN driver Audio Problem No Audio Possible Cause Speaker or headphone is set to multi-channel. The front and back audio ports do not work , contact the ASUS service center. Driver problems...
... access the Internet Your computer is on. Reinstall the audio driver ASUS G21CN-D 33 If one port failed, check if the port is connected to the wrong port. headphone. Close the anti-virus software. Action Connect the LAN cable to your computer is not connected. Reinstall the LAN driver Audio Problem No Audio Possible Cause Speaker or headphone is set to multi-channel. The front and back audio ports do not work , contact the ASUS service center. Driver problems...
G21CN-D Users Manual
Page 34
.... Incompatible softwares are running. Hard disk drive failure • S end the damaged hard disk drive to ASUS Service Center for servicing. • Replace with compatible memory modules. • Remove the extra memory modules that you have installed, then try again. • C ontact the ASUS Service Center for assistance. Memory module problems There is too slow Possible Cause Too many programs are installed. • Replace with a new hard disk drive. Reinstall the OS and reinstall compatible softwares. 34 Chapter 5: Troubleshooting Move your...
.... Incompatible softwares are running. Hard disk drive failure • S end the damaged hard disk drive to ASUS Service Center for servicing. • Replace with compatible memory modules. • Remove the extra memory modules that you have installed, then try again. • C ontact the ASUS Service Center for assistance. Memory module problems There is too slow Possible Cause Too many programs are installed. • Replace with a new hard disk drive. Reinstall the OS and reinstall compatible softwares. 34 Chapter 5: Troubleshooting Move your...
G21CN-D Users Manual
Page 35
... the ASUS Service Center. ASUS G21CN-D 35 Possible Cause Your computer is normal. The fan runs on the computer. Update the BIOS to download the latest BIOS versions. There is not enough air Ensure that you know how to reinstall the motherboard, try to your computer is powering on. in use. The fan slows down after turning on its default settings. Visit the ASUS Support site at http://support.asus.com...
... the ASUS Service Center. ASUS G21CN-D 35 Possible Cause Your computer is normal. The fan runs on the computer. Update the BIOS to download the latest BIOS versions. There is not enough air Ensure that you know how to reinstall the motherboard, try to your computer is powering on. in use. The fan slows down after turning on its default settings. Visit the ASUS Support site at http://support.asus.com...
G21CX Users Manual
Page 17
... air vents on the rear panel of the discrete graphic card. 2. These vents allow air ventilation. Air vents. Always provide proper ventilation for your computer. ` ASUS G21CX 17 ENGLISH Optical S/PDIF out port. This port allows you through connecting the main hardware devices, such as the external monitor, keyboard, mouse, and power cord, to the graphic output port of your computer. Connecting a USB keyboard and a USB mouse Connect a USB keyboard and a USB mouse to the USB ports on the chassis.
... air vents on the rear panel of the discrete graphic card. 2. These vents allow air ventilation. Air vents. Always provide proper ventilation for your computer. ` ASUS G21CX 17 ENGLISH Optical S/PDIF out port. This port allows you through connecting the main hardware devices, such as the external monitor, keyboard, mouse, and power cord, to the graphic output port of your computer. Connecting a USB keyboard and a USB mouse Connect a USB keyboard and a USB mouse to the USB ports on the chassis.
G21CX Users Manual
Page 23
... display has display during POST. From the Start menu, click Settings > System > Display. 5. Setting up multiple displays: 1. Configure the settings for details on how to connect a monitor to set display modes. Turn off your displays. To set to enlarge your computer. 4. Turn on the ASUS Graphics Card may come with different models. The dual display function works only under Windows. The display output ports on your Windows desktop. For some graphic cards, only the monitor that is set up multiple displays When using multiple monitors, you to the monitors...
... display has display during POST. From the Start menu, click Settings > System > Display. 5. Setting up multiple displays: 1. Configure the settings for details on how to connect a monitor to set display modes. Turn off your displays. To set to enlarge your computer. 4. Turn on the ASUS Graphics Card may come with different models. The dual display function works only under Windows. The display output ports on your Windows desktop. For some graphic cards, only the monitor that is set up multiple displays When using multiple monitors, you to the monitors...
G21CX Users Manual
Page 35
... can use this recovery option, click Settings > Update & recovery > Recovery from the Start menu, select Refresh your PC without affecting your files, and click Get started. ? The DVD drive eject button is scratched or damaged. ? To use Windows® 10 Refresh your PC without affecting your files recovery option to restore or undo changes to an electrical source and turned on. • Adjust your speakers' volume. • Ensure that you connect your speakers...
... can use this recovery option, click Settings > Update & recovery > Recovery from the Start menu, select Refresh your PC without affecting your files, and click Get started. ? The DVD drive eject button is scratched or damaged. ? To use Windows® 10 Refresh your PC without affecting your files recovery option to restore or undo changes to an electrical source and turned on. • Adjust your speakers' volume. • Ensure that you connect your speakers...
G21CX Users Manual
Page 36
... the power outlet. Display Problem Possible Cause No display output after turning the computer on your computer. PSU (Power supply unit) problems Contact the ASUS Service Center about installing another monitor. 36 Chapter 5: Troubleshooting Signal cable problems Action • Connect the signal cable to the correct display port (onboard VGA or discrete VGA port). • If you are using a discrete VGA card, connect the signal cable to your area's power requirements. • Adjust the voltage settings. ENGLISH Power Problem No power (The power indicator...
... the power outlet. Display Problem Possible Cause No display output after turning the computer on your computer. PSU (Power supply unit) problems Contact the ASUS Service Center about installing another monitor. 36 Chapter 5: Troubleshooting Signal cable problems Action • Connect the signal cable to the correct display port (onboard VGA or discrete VGA port). • If you are using a discrete VGA card, connect the signal cable to your area's power requirements. • Adjust the voltage settings. ENGLISH Power Problem No power (The power indicator...
G21CX Users Manual
Page 37
... LAN LED is not connected. Cannot access the Internet Your computer is set to the wrong port. Action • Refer to your computer's User Guide for the correct LAN settings. Speaker or headphone does Try using another LAN cable. If one port failed, check if the port is not properly connected to your computer. Reinstall the LAN driver Audio Problem No Audio Possible Cause Speaker or headphone is properly connected to your computer. Reinstall the audio driver ASUS...
... LAN LED is not connected. Cannot access the Internet Your computer is set to the wrong port. Action • Refer to your computer's User Guide for the correct LAN settings. Speaker or headphone does Try using another LAN cable. If one port failed, check if the port is not properly connected to your computer. Reinstall the LAN driver Audio Problem No Audio Possible Cause Speaker or headphone is properly connected to your computer. Reinstall the audio driver ASUS...
G21CX Users Manual
Page 39
Old BIOS version Action It is booting up. The fan runs on its default settings. The fan slows down after turning on . Restore the BIOS to its full speed when the computer is powering on the computer. Ensure that your Desktop PC's warranty card and contact the ASUS Service Center. Computer is not enough air Ensure that you know how to reinstall the motherboard, try to download the latest BIOS versions...
Old BIOS version Action It is booting up. The fan runs on its default settings. The fan slows down after turning on . Restore the BIOS to its full speed when the computer is powering on the computer. Ensure that your Desktop PC's warranty card and contact the ASUS Service Center. Computer is not enough air Ensure that you know how to reinstall the motherboard, try to download the latest BIOS versions...
G21CN series users manual
Page 16
.... Plug the monitor to the USB ports on the chassis. This port allows you through connecting the main hardware devices, such as the external monitor, keyboard, mouse, and power cord, to connect your computer. ` 16 Chapter 1: Getting started DO NOT block the air vents on the rear panel of the discrete graphic card. 2. Connecting an external monitor To connect an external monitor: 1. Air vents. Setting up your computer This section guides you to your computer. ENGLISH Optical S/PDIF...
.... Plug the monitor to the USB ports on the chassis. This port allows you through connecting the main hardware devices, such as the external monitor, keyboard, mouse, and power cord, to connect your computer. ` 16 Chapter 1: Getting started DO NOT block the air vents on the rear panel of the discrete graphic card. 2. Connecting an external monitor To connect an external monitor: 1. Air vents. Setting up your computer This section guides you to your computer. ENGLISH Optical S/PDIF...
G21CN series users manual
Page 22
... ports on the ASUS Graphics Card may come with different models. To set up your computer section in Chapter 1 for your computer. 4. Configure the settings for details on your displays. Refer to be the primary display has display during POST. From the Start menu, click Settings > System > Display. 5. The dual display function works only under Windows. 22 Chapter 2: Connecting devices to enlarge your computer Turn off your computer. 3. Setting up multiple displays When using multiple monitors...
... ports on the ASUS Graphics Card may come with different models. To set up your computer section in Chapter 1 for your computer. 4. Configure the settings for details on your displays. Refer to be the primary display has display during POST. From the Start menu, click Settings > System > Display. 5. The dual display function works only under Windows. 22 Chapter 2: Connecting devices to enlarge your computer Turn off your computer. 3. Setting up multiple displays When using multiple monitors...
G21CN series users manual
Page 33
... the disc is not muted, click and drag the slider to my computer's system settings without affecting your HDTV. The DVD drive eject button is not responding. 1. To change the screen resolution: • From the Start menu, click Settings > System > Display. ? I want to restore or undo changes to adjust the volume. • Connect your personal data such as . You can use this recovery option, click Settings > Update & recovery > Recovery from the menu ASUS...
... the disc is not muted, click and drag the slider to my computer's system settings without affecting your HDTV. The DVD drive eject button is not responding. 1. To change the screen resolution: • From the Start menu, click Settings > System > Display. ? I want to restore or undo changes to adjust the volume. • Connect your personal data such as . You can use this recovery option, click Settings > Update & recovery > Recovery from the menu ASUS...
G21CN series users manual
Page 34
... No display output after turning the computer on (Black screen) The signal cable is not connected to the correct VGA port on your computer is turned on. ENGLISH Power Problem No power (The power indicator is off) Possible Cause Incorrect power voltage Action • Set your computer's power voltage switch to your computer. Try connecting to another PSU on . PSU (Power supply unit) problems Contact the ASUS Service Center about installing another monitor. 34 Chapter 5: Troubleshooting Your...
... No display output after turning the computer on (Black screen) The signal cable is not connected to the correct VGA port on your computer is turned on. ENGLISH Power Problem No power (The power indicator is off) Possible Cause Incorrect power voltage Action • Set your computer's power voltage switch to your computer. Try connecting to another PSU on . PSU (Power supply unit) problems Contact the ASUS Service Center about installing another monitor. 34 Chapter 5: Troubleshooting Your...
G21CN series users manual
Page 37
... after turning on its default settings. Update the BIOS to clean the inner space of the chassis. • C ontact the ASUS Service Center for assistance. Ensure that your Desktop PC's warranty card and contact the ASUS Service Center. Visit the ASUS Support site at http:// support.asus.com to your computer is too high. • Update the BIOS. • If you are using a compatible or ASUS-recommended CPU fan. The BIOS settings have been changed. ENGLISH CPU Problem...
... after turning on its default settings. Update the BIOS to clean the inner space of the chassis. • C ontact the ASUS Service Center for assistance. Ensure that your Desktop PC's warranty card and contact the ASUS Service Center. Visit the ASUS Support site at http:// support.asus.com to your computer is too high. • Update the BIOS. • If you are using a compatible or ASUS-recommended CPU fan. The BIOS settings have been changed. ENGLISH CPU Problem...
