Lenovo B550, 57323748 Troubleshooting Sleep or hibernation problems, Computer screen problems

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Chapter 5. Troubleshooting

Sleep or hibernation problems

The critical low-battery error message appears, and the computer immediately turns off.

The computer enters sleep mode immediately after Power-on self-test (POST).

•The battery power is getting low. Connect the AC adapter to the computer, or replace the battery with a fully charged one.

•Make sure that:

-The battery is charged.

-The operating temperature is within the acceptable range. See “Appendix B. Use, and care information” on page 36.

Note: If the battery is charged and the temperature is within range, have the computer serviced.

The computer does not return from sleep mode and the computer does not work.

•If the computer does not return from sleep mode, it may have entered hibernation mode automatically because the battery is depleted. Check the power indicator.

•If your computer is in sleep mode, connect the AC adapter to the computer, then press any key or the power button.

•If your computer is in hibernation mode or power-off state, connect the AC adapter to the computer, then press the power button to resume operation.

Note: If the system still does not return from sleep mode, your system has stopped responding, and you cannot turn off the computer, reset the computer. However, unsaved data may be lost. To reset the computer, press and hold the power button for 4 seconds or more. If the computer is still not reset, remove the AC adapter and the battery.

Computer screen problems

The screen is blank.

• Do the following:

The screen is unreadable or distorted.

Incorrect characters appear on the screen.

A message, “Unable to create overlay window,” appears when you try to start DVD playback.

-or-

You get poor or no playback of video, DVD or game applications.

-If you are using the AC adapter, or using the battery, and the battery status indicator is on, press Fn + ↑ to make the screen brighter.

-If the power indicator is in blinking, press the power button to resume from the sleep mode.

-If the problem persists, follow the solution in the following problem “The screen is unreadable or distorted.”

-Press Fn+F2 to confirm whether the LCD screen has been turned off.

•Make sure that:

-The display device driver is installed correctly.

-The screen resolution and color quality are correctly set.

-The monitor type is correct.

•Did you install the operating system or application program correctly? If they are installed and configured correctly, have the computer serviced.

•Do either of the following:

-If you are using 32-bit color mode, change the color depth to 16-bit mode.

-If you are using a desktop resolution over the optimum, reduce the display resolution and the color depth.

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Contents Lenovo B550 First Edition January Copyright Lenovo Dear user Explanation of hard disk capacity Contents Unpack Important safety informationImportant safety information „ Read this firstCorrect usage procedures Important safety informationService and upgrades Getting to know your computer Touchpad Getting to know your computer Power buttonSystem status Select models onlyVGA port Getting to know your computerFan louvers RJ-45 portOptical drive USB portMicrophone jack Headphone jack SpeakersManual Battery pack Battery latchSpring loaded Hard disk drive „ Reading the manuals „ Connecting to the power„ Configuring the operating system Learning the basicsLearning the basics „ Shutting down your computerPutting your computer into sleep state „ Removing the battery pack Using AC adapter and battery„ Checking battery status „ Charging the batteryLeft click button „ Handling the battery„ Function key combinations „ Numeric keypadLearning the basics OneKey Rescue system button E f System status indicators„ Using passwords „ Using VeriFace„ Attaching a security lock not supplied Enabling Bluetooth communications Connecting external devices„ Connecting a universal serial bus USB device „ Connecting a Bluetooth enabled device select models only„ Software configuration Using the Internet„ Hardware connection Enabling wireless connection Wireless connection„ Using Wi-Fi/WiMAX Using the Internet„ Introduction OneKey Rescue systemFrequently asked questions TroubleshootingWhat can I do if the backup process fails? TroubleshootingPassword problem Display problemsComputer screen problems Troubleshooting Sleep or hibernation problemsStartup problem Troubleshooting Sound problemsBattery problems Hard disk drive problemTroubleshooting Other problems To replace the battery, do the following Replacing the batteryUpgrading and replacing devices To replace the hard disk drive, do the following Replacing the hard disk driveUpgrading and replacing devices Handling a hard disk driveUpgrading and replacing devices To install an SO-DIMM, do the following Upgrading and replacing devices To remove the optical drive, do the following Removing the optical driveUpgrading and replacing devices Calling the customer support center Appendix A. Getting help and serviceGetting help around the world Appendix A. Getting help and serviceWarranty Service Telephone Numbers Lenovo warranty service telephone numbers„ Notice of static-electricity „ Be careful about where and how you workAppendix B. Use, and care information Caring for your computer„ Handle storage media and drives properly „ Be gentle with your computer„ Carry your computer properly „ For outdoor use„ Take care in setting passwords „ Data safety„ Other important tips „ What if you are traveling? „ Ergonomic information„ Questions about vision? „ General tips for maintenance „ Cleaning your computer keyboard „ Cleaning the cover of your computer„ Cleaning your computer display „ What your service provider will do to correct problems Appendix C. Lenovo limited warranty„ What this warranty covers „ How to obtain warranty serviceAppendix C. Lenovo limited warranty „ Replacement of a product or part„ Your additional responsibilities „ Use of personal information „ What this warranty does not cover„ Limitation of liability „ Other rights „ Dispute resolution„ European Economic Area EEA „ Suplemento de Garantía para México Lenovo Technology B.V. Turkiye Istanbul Subesi „ Lenovo Turkey addressCustomer Carry-In or Mail-In Service „ Types of warranty serviceCustomer Replaceable Unit CRU Service On-site Service Courier or Depot ServiceAppendix C. Lenovo limited warranty Product Exchange Service Appendix D. Customer replaceable units CRUs Appendix E. Notices Appendix E. Notices „ Export classification noticeWindows Energy Star model informationWindows XP „ Wireless interoperability Wireless related information„ Usage environment and your health „ Safety information related to Mobile BroadbandTV tuner information Appendix E. Notices „ Federal Communications Commission FCC Statement Electronic emissions notices„ Avis de conformité à la réglementation d’Industrie Canada „ Industry Canada Class B Emission Compliance Statement„ German Class B Compliance Statement „ European Union Compliance Statement Class B Compliance Weee and recycling statements Türkiye EEE Yönetmeliğine Uygunluk BeyanıTurkish statement of compliance EU Weee statements Japan recycling statements„ Disposing of a Lenovo Computer Components Appendix E. Notices Appendix F. Features and specifications Trademarks Index Index Page Do not Return IT to the Store New World. New Thinking.TM

B550, 57323748 specifications

The Lenovo B550 (model number 57323748) is a versatile and efficient business laptop designed to meet the demands of professional users who require both performance and reliability. This model stands out in Lenovo's lineup due to its well-balanced combination of features, technologies, and characteristics, making it an ideal choice for both on-the-go professionals and office environments.

One of the key features of the B550 is its durable design. The laptop is built with robust materials that withstand the rigors of frequent travel while maintaining a sleek and professional appearance. The spill-resistant keyboard adds an additional layer of protection, ensuring that accidental spills won't jeopardize the device's functionality.

Under the hood, the Lenovo B550 is powered by a choice of the latest Intel or AMD processors, delivering exceptional processing power for multitasking and demanding applications. Coupled with generous RAM options, users can seamlessly run multiple applications without experiencing lag, making it an efficient tool for productivity.

The B550 also boasts impressive storage options, including solid-state drives (SSDs) that not only increase the speed of boot times and application launches but also enhance overall system performance. Users can choose from a variety of storage capacities to suit their needs, ensuring that they have ample space for files and applications.

Display quality is important for any laptop, and the B550 does not disappoint. It features a high-resolution display with vibrant colors and sharp details, ensuring that users can enjoy crisp visuals whether they're working on a presentation or watching multimedia content. Additionally, anti-glare technology helps reduce eye strain during extended use.

Connectivity is another strong point of the B550. The laptop comes equipped with a range of ports, including USB Type-C, HDMI, and various USB-A ports, allowing for easy connection to peripherals and external displays. Additionally, integrated Wi-Fi and Bluetooth technologies provide reliable wireless connectivity for internet access and device pairing.

Security features are also a priority for the Lenovo B550. The device includes a fingerprint reader and TPM (Trusted Platform Module) to protect sensitive data and ensure secure login. This is particularly important for business users handling confidential information.

In conclusion, the Lenovo B550 (57323748) is a well-rounded business laptop that emphasizes durability, performance, and security. Its combination of advanced technologies and user-friendly features makes it a solid choice for professionals seeking a reliable machine that can keep up with their fast-paced work environment.
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