Lenovo A720 manual Symptom-to-FRU Index, Hard disk drive boot error, Power Supply Problems

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Chapter 6. Symptom-to-FRU Index

The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with Chapter 4, “General Checkout,” on page 11. This index can also be used to help you decide which FRUs to have available when servicing a computer. If you are unable to correct the problem using this index, go to “Undetermined problems” on page 20.

Notes:

•If you have both an error message and an incorrect audio response, diagnose the error message first.

•If you cannot run the diagnostic tests or you get a diagnostic error code when running a test but did receive a POST error message, diagnose the POST error message first.

•If you did not receive any error message look for a description of your error symptoms in the first part of this index.

Hard disk drive boot error

A hard disk drive boot error can be caused by the following.

Error

FRU/Action

 

 

The startup drive is not included in the boot sequence

Check the configuration and ensure the startup drive is

configuration.

in the boot sequence.

 

 

No operating system is installed on the boot drive.

Install an operating system on the boot drive.

 

 

The boot sector on the startup drive is corrupted.

The drive must be formatted. Do the following:

 

1. Attempt to back up the data on the failing hard disk

 

drive.

 

2. Use the operating system to format the hard disk

 

drive.

 

 

The drive is defective.

Replace the hard disk drive.

 

 

Power Supply Problems

Follow these procedures if you suspect there is a power supply problem.

Check/Verify

FRU/Action

 

 

Check that the following are properly installed:

Reseat connectors

•

Power Cord

 

•

On/Off Switch connector

 

• System Board Power Supply connectors

 

•

Microprocessor connections

 

 

 

Check the power cord.

Power Cord

 

 

Check the power-on switch.

Power-on Switch

 

 

 

© Copyright Lenovo 2012

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Contents IdeaCentre A720 Hardware Maintenance Manual Page IdeaCentre A720 Hardware Maintenance Manual Page Contents Iv IdeaCentre A720Hardware Maintenance Manual About this manual Important Safety InformationIdeaCentre A720Hardware Maintenance Manual General safety Safety informationElectrical safety IdeaCentre A720Hardware Maintenance Manual Handling electrostatic discharge-sensitive devices Safety inspection guideGrounding requirements Safety noticesTo Connect To Disconnect Do not≥18 kg 37 lbs ≥32 kg 70.5 lbs ≥55 kg 121.2 lbs General information SpecificationsType IdeaCentre A720 EnvironmentIdeaCentre A720Hardware Maintenance Manual General Checkout IdeaCentre A720Hardware Maintenance Manual Starting the Lenovo Bios Setup Utility program Using the Setup UtilityViewing and changing settings Using passwordsSetting, changing, or deleting an Administrator password Administrator PasswordSetting, changing, or deleting a Power-On Password Select Save changes and Exit from the menu Enabling or disabling a deviceSelecting 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 Hard disk drive boot error Symptom-to-FRU IndexPower Supply Problems Error FRU/ActionUndetermined problems Post error codesPost Error Message Description/Action Font view Locating connectors, controls and componentsLeft and right view Rear view CPU Hardware componentsIdentifying 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 To replace the power cord and power adapter Replacing the power cord or power adapterReplacing the keyboard and mouse To replace the keyboard and mouseTo remove the base cover Removing the base coverTo replace the hard disk drive Replacing the hard disk driveReplacing hardware Replacing the system fan Replacing a memory moduleTo replace a memory module To replace the system fanTo replace the heat-sink Replacing the heat-sinkTo replace the CPU Replacing the CPUReplacing hardware To replace the optical drive Replacing the optical driveReplacing hardware Replacing the optical drive eject board Replacing the solid state diskTo replace the solid state disk To replace the optical drive eject boardTo replace the motherboard Replacing the motherboardIdeaCentre A720Hardware Maintenance Manual To replace the speaker system Replacing the speaker systemIdeaCentre A720Hardware Maintenance Manual To replace the TV tuner card Replacing the TV tuner cardTo replace the battery Replacing the batteryTo remove the hinge from the chassis Removing the hinge from the chassisIdeaCentre A720Hardware Maintenance Manual To remove the rear cover Removing the rear coverTo replace the scalar board Replacing the scalar boardReplacing hardware To replace the touch control board Replacing the touch control boardTo replace the converter board Replacing the converter boardTo replace the power switch board Replacing the power switch boardTo replace the Bluetooth module Replacing the Bluetooth moduleTo replace the Wlan card Replacing the Wlan cardTo replace the camera Replacing the cameraTo replace the front function board Replacing the front function boardTo replace the LED panel Replacing the LED panelIdeaCentre A720Hardware Maintenance Manual FRU lists Motherboard Item # FRUs Service Part Number FRUHard disk drive MemorySolid state disk Optical disk driveRemote control Power SupplyBluetooth module Heat-sinkKeyboard Touch control boardMouse Power cordsPanel Back Light Cable MechanicalIdeaCentre A720Hardware Maintenance Manual Power management Additional Service InformationAdvanced configuration and power interface Acpi Bios 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.
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