Lenovo manual IdeaCentre A720Hardware Maintenance Manual

Page 10

Observe the following rules when working on electrical equipment.

Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have rubber floor mats near their equipment that contain small conductive fibers to decrease electrostatic discharge.

•Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the switch or unplug the power cord quickly.

•Do not work alone under hazardous conditions or near equipment that has hazardous voltages.

•Disconnect all power before:

–Performing a mechanical inspection

–Working near power supplies

–Removing or installing Field Replaceable Units (FRUs)

•Before you start to work on the computer, unplug the power cord. If you cannot unplug it, ask the customer to power-off the electrical outlet that supplies power to the machine and to lock the electrical outlet in the off position.

•If you need to work on a computer that has exposed electrical circuits, observe the following precautions:

–Ensure that another person, familiar with the power-off controls, is near you. Remember: Another person must be there to switch off the power, if necessary.

–Use only one hand when working with powered-on electrical equipment; keep the other hand in your pocket or behind your back.

Remember: There must be a complete circuit to cause electrical shock. By observing the above rule, you may prevent a current from passing through your body.

–When using a tester, set the controls correctly and use the approved probe leads and accessories for that tester.

–Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as metal floor strips and machine frames.

Observe the special safety precautions when you work with very high voltages; these instructions are in the safety sections of the maintenance information. Use extreme care when measuring high voltages.

•Regularly inspect and maintain your electrical hand tools to ensure they are safe to use.

•Do not use worn or broken tools and testers.

•Never assume that power has been disconnected from a circuit. First, check that it has been powered off.

•Always look carefully for possible hazards in your work area. Examples of these hazards are wet floors, non-grounded power extension cables, conditions that may cause or allow power surges, and missing safety grounds.

•Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. This surface is conductive, and touching a live circuit can cause personal injury and damage to the computer.

•Do not service the following parts with the power on when they are removed from their normal operating positions in a computer:

–Power supply units

–Pumps

–Blowers and fans

–Motor generators

and similar units. (This practice ensures correct grounding of the units.)

•If an electrical accident occurs:

– Use caution; do not become a victim yourself.

4IdeaCentre A720Hardware Maintenance Manual

Page 9 Page 11
Image 10
Page 9 Page 11
Contents IdeaCentre A720 Hardware Maintenance Manual Page IdeaCentre A720 Hardware Maintenance Manual Page Contents Iv IdeaCentre A720Hardware Maintenance Manual Important Safety Information About this manualIdeaCentre A720Hardware Maintenance Manual General safety Safety informationElectrical safety IdeaCentre A720Hardware Maintenance Manual Safety inspection guide Handling electrostatic discharge-sensitive devicesSafety notices Grounding requirementsDo not To Connect To Disconnect≥18 kg 37 lbs ≥32 kg 70.5 lbs ≥55 kg 121.2 lbs Type IdeaCentre A720 SpecificationsGeneral information EnvironmentIdeaCentre A720Hardware Maintenance Manual General Checkout IdeaCentre A720Hardware Maintenance Manual Viewing and changing settings Using the Setup UtilityStarting the Lenovo Bios Setup Utility program Using passwordsSetting, changing, or deleting an Administrator password Administrator PasswordSetting, changing, or deleting a Power-On Password Enabling or disabling a device Select Save changes and Exit from the menuSelecting a temporary startup device Selecting a startup deviceSelecting or changing the startup device sequence Exiting the Lenovo Bios Setup Utility program IdeaCentre A720Hardware Maintenance Manual Power Supply Problems Symptom-to-FRU IndexHard disk drive boot error Error FRU/ActionUndetermined problems Post error codesPost Error Message Description/Action Locating connectors, controls and components Font viewLeft and right view Rear view Hardware components CPUIdentifying parts on the motherboard TV-Tuner card connector Battery Identifying parts on the back of the LED panel IdeaCentre A720Hardware Maintenance Manual Replacing hardware Pre-disassembly instructionsGeneral information Replacing the keyboard and mouse Replacing the power cord or power adapterTo replace the power cord and power adapter To replace the keyboard and mouseRemoving the base cover To remove the base coverReplacing the hard disk drive To replace the hard disk driveReplacing hardware To replace a memory module Replacing a memory moduleReplacing the system fan To replace the system fanReplacing the heat-sink To replace the heat-sinkReplacing the CPU To replace the CPUReplacing hardware Replacing the optical drive To replace the optical driveReplacing hardware To replace the solid state disk Replacing the solid state diskReplacing the optical drive eject board To replace the optical drive eject boardReplacing the motherboard To replace the motherboardIdeaCentre A720Hardware Maintenance Manual Replacing the speaker system To replace the speaker systemIdeaCentre A720Hardware Maintenance Manual Replacing the TV tuner card To replace the TV tuner cardReplacing the battery To replace the batteryRemoving the hinge from the chassis To remove the hinge from the chassisIdeaCentre A720Hardware Maintenance Manual Removing the rear cover To remove the rear coverReplacing the scalar board To replace the scalar boardReplacing hardware Replacing the touch control board To replace the touch control boardReplacing the converter board To replace the converter boardReplacing the power switch board To replace the power switch boardReplacing the Bluetooth module To replace the Bluetooth moduleReplacing the Wlan card To replace the Wlan cardReplacing the camera To replace the cameraReplacing the front function board To replace the front function boardReplacing the LED panel To replace the LED panelIdeaCentre A720Hardware Maintenance Manual FRU lists Item # FRUs Service Part Number FRU MotherboardSolid state disk MemoryHard disk drive Optical disk driveBluetooth module Power SupplyRemote control Heat-sinkTouch control board KeyboardPower cords MouseMechanical Panel Back Light CableIdeaCentre A720Hardware Maintenance Manual Advanced configuration and power interface Acpi Bios Additional Service InformationPower management Automatic Power-On features

A720 specifications

The Lenovo A720 stands out as a versatile and stylish all-in-one PC that caters to both home entertainment and productivity needs. Launched as part of Lenovo's A-series lineup, it combines powerful performance with an elegant design, making it an appealing choice for users seeking a comprehensive computing solution.

One of the key features of the Lenovo A720 is its stunning 27-inch display, which boasts a Full HD resolution of 1920 x 1080 pixels. This high-quality display delivers crisp images and vibrant colors, enhancing the overall viewing experience for movies, games, and graphic design tasks. The A720 also comes equipped with multi-touch technology, allowing users to interact with the screen intuitively, facilitating seamless navigation and control.

Under the hood, the Lenovo A720 is powered by Intel's third-generation Core processors, which provide robust performance for multitasking and demanding applications. Depending on the configuration, users can choose between various processor options, including Core i5 and i7, ensuring that they have sufficient processing power for their specific requirements. Coupled with up to 16GB of RAM, the A720 can handle multiple applications running simultaneously, making it an excellent choice for multitaskers.

The A720's storage options include a hybrid of traditional hard drives and solid-state drives, allowing for both capacity and speed. With up to 1TB of storage space available, users can store their files, media, and applications without worrying about running out of space. The integration of SSD technology enhances boot and load times, ensuring a snappy user experience.

For connectivity, the Lenovo A720 offers a wide array of ports, including USB 3.0, HDMI, and audio jacks, making it easy to connect peripherals and external devices. Additionally, it features integrated Wi-Fi and Bluetooth capabilities, enabling seamless wireless connectivity for internet access and file sharing.

Another notable aspect of the Lenovo A720 is its sleek aesthetic, featuring a thin profile and a stand that allows for adjustment of the screen angle. This design not only enhances the aesthetic appeal of the device but also provides ergonomic benefits for prolonged usage.

In conclusion, the Lenovo A720 is a well-rounded all-in-one PC that combines impressive display quality, powerful performance, and modern connectivity options. Its multi-touch screen, strong processing capabilities, and stylish design make it a great choice for both casual users and professionals looking for a comprehensive solution for work and entertainment. Whether for watching movies, playing games, or executing productivity tasks, the Lenovo A720 delivers an exceptional experience.
Top Page Image Contents