POST error codes

Each time you turn the computer on, it performs a series of tests to check that the system is operating correctly and that certain options are set. This series of tests is called the Power-OnSelf-Test, or POST. POST does the following:

Checks some basic system-board operations

Checks that the memory is working correctly

Starts video operations

Verifies that the boot drive is working

POST Error Message

Description/Action

 

 

Keyboard error

Cannot initialize the keyboard. Make sure the keyboard

 

is properly connected to the computer and that no keys

 

are held pressed during POST. To purposely configure

 

the computer without a keyboard, select Keyboardless

 

operation in Startup option to Enabled. The BIOS then

 

ignores the missing keyboard during POST.

 

 

Reboot and Select proper Boot device or Insert Boot

The BIOS was unable to find a suitable boot device. Make

Media in selected Boot device

sure the boot drive is properly connected to the computer.

 

Make sure you have bootable media in the boot device.

 

 

Undetermined problems

1.Power-off the computer.

2.Remove or disconnect the following components (if connected or installed) one at a time.

a.External devices (modem, printer, or mouse)

b.Extended video memory

c.External Cache

d.External Cache RAM

e.Hard disk drive

f.Disk drive

3.Power-on the computer to re-test the system.

4.Repeat steps 1 through 3 until you find the failing device or component.

If all devices and components have been removed and the problem continues, replace the system board.

20Lenovo H520sHardware Maintenance Manual

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Lenovo H520S manual Post error codes, Undetermined problems, Post Error Message Description/Action

H520S specifications

The Lenovo H520S is a compact desktop PC designed to cater to both home and office environments. It combines sleek design with robust performance, making it an excellent choice for users seeking versatility in a desktop system. One of the standout features of the H520S is its powerful computing capabilities, driven by Intel's third-generation Core processor family. This ensures that tasks ranging from everyday browsing to demanding applications run smoothly and efficiently.

The design of the Lenovo H520S is notably space-saving, allowing it to fit comfortably in various environments without taking up excessive desk space. With a brushed metal finish and minimalist aesthetic, it blends seamlessly with modern office setups and home entertainment centers alike. The compact chassis not only contributes to its stylish appearance but also enhances portability, making it easier to transport if needed.

In terms of performance, the H520S is equipped with up to 16GB of DDR3 RAM, which provides ample memory for multitasking and running multiple applications simultaneously. The inclusion of integrated graphics and support for discrete graphics options allows users to engage in casual gaming and enjoy multimedia content without lag. For storage, the system offers a range of hard drive options, including traditional HDDs and faster SSDs, catering to different performance and capacity needs.

The desktop is also designed with connectivity in mind. It features multiple USB ports, HDMI output, and audio jacks, ensuring compatibility with a wide range of peripherals and devices. Additionally, the Lenovo H520S includes built-in Wi-Fi and Ethernet options for seamless internet connectivity, enabling users to stay connected whether working from home or in a busy office.

User convenience extends to its energy efficiency, with the H520S being Energy Star certified. This not only contributes to lower energy bills but also reflects Lenovo's commitment to sustainability. Overall, the Lenovo H520S stands out with its combination of compact design, powerful performance, and thoughtful features, making it an ideal choice for anyone looking for a reliable desktop solution that meets both personal and professional needs.