Lenovo 628323U manual Power button problem, Sleep problems

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If your computer is getting no power at all, check the following items:

1.Verify the power button. Refer to “System status indicators” on page 5. The red dot in the ThinkPad logo is lit whenever the computer is on.

2.Check all power connections. Remove any power strips and surge protectors to connect the ac power adapter directly to the ac power outlet.

3.Inspect the ac power adapter. Check for any physical damage, and make sure that the power cable is firmly attached to the adapter brick and the computer.

4.Verify if the ac power source is working by checking the ac power status indicator. Refer to “Power status indicator” on page 7. The ac power status indicator is lit when ac is connected to the computer.

5.Remove all devices and then test for system power with minimal devices attached.

a.Disconnect the ac power adapter and all cables from the computer.

b.Close the computer display, and turn the computer over.

c.Remove the battery. Refer to “Replacing the battery” on page 27.

d.Remove the memory module. Refer to “Replacing a memory module” on page 32.

e.Remove the PCI Express Mini Card. Refer to “Replacing a PCI Express Mini Card for wireless LAN connection” on page 29.

f.Wait for 30 seconds, and then reinstall the memory module and the known good battery or the ac power adapter to test the computer with minimal devices attached first.

g.Reinstall each device one at a time that you have removed in the earlier steps.

If your computer does not run on battery power, check the following items:

1.Remove and reseat the battery to make sure that it is properly connected. Refer to “Replacing the battery” on page 27.

2.Swap batteries with another similar model, if available.

If another similar ThinkPad model is available, then verify that the battery pack works in the other computer and that the battery pack for the other model works in this computer.

3.Verify the battery-status indicator. Refer to “Power status indicator” on page 7.

A power button problem

Problem: The system does not respond, and you cannot turn off the computer.

Solution: Turn off the computer by pressing and holding the power button for 4 seconds or more. If the system is still not reset, remove the ac power adapter and the battery.

Sleep problems

•Problem: The computer enters sleep mode unexpectedly.

Solution: If the microprocessor overheats, the computer automatically enters sleep mode to allow the computer to cool and to protect the microprocessor and other internal components. Check the settings for sleep mode.

•Problem: The computer enters sleep mode (the sleep indicator turns on) immediately after the power-on self-test.

Solution: Ensure that:

–The battery is charged.

–The operating temperature is within the acceptable range. Refer to “Operating environment” on page 10.

Chapter 5. Troubleshooting computer problems 49

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Contents User Guide Safety, Warranty, and Setup Guide Regulatory Notice Contents Appendix B. Weee and recycling Statements Protect the cables from being damaged Read this firstProtect yourself from the heat that your computer generates Prevent your computer from getting wetCarry your computer carefully Important safety informationConditions that require immediate action Handle your computer gentlyService and upgrades Safety guidelinesExtension cords and related devices Power cords and power adaptersPower supply statement Plugs and outletsExternal devices Rechargeable battery notice General battery noticeHeat and product ventilation Electrical current safety informationLiquid crystal display LCD notice Using headphones or earphonesAdditional safety information Xii User Guide Camera Locating computer controls, connectors, and indicatorsProduct overview Front viewMicrophone System status indicatorPower button Right-side viewMedia card reader slot USB 2.0 connectorPower status indicator Ac power connectorLeft-side view VGA connectorUSB 3.0 connectors Ethernet connectorStatus indicators System status indicatorsBottom view User Guide Machine type and model label Wireless status indicatorPower status indicator Locating important product informationFCC ID and IC Certification number label Specifications FeaturesOperating environment Power source ac power adapterBattery pack Battery lifeRegistering your computer Using your computerFrequently asked questions How can I use the battery power more effectively?Special keys How do I give presentations or attach an external monitor?How do I attach or replace a device? Using the TrackPoint pointing device Using the UltraNav pointing deviceUsing the touch pad Changing the capCustomizing the touch pad Connecting the ac power adapter Power managementChecking the battery status Using the ac power adapterHandling the battery Charging the batteryMaximizing the battery life Power-saving modesUsing your computer Wireless LAN connection status Connecting to a wireless LANEstablishing wireless LAN connections Go to Settings Internet connection Wi-Fi networkAttaching an external monitor Connecting a projector or an external monitorTips for using the wireless LAN feature Connecting an external monitorUsing audio features Using the cameraUsing a flash media card Removing a flash media card Inserting a flash media cardUser Guide Accessibility and comfort You and your computerErgonomic information Comfort Accessibility informationAssistive technologies Travel accessoriesTraveling with your computer Travel tipsUser Guide Replacing the battery Replacing devicesStatic electricity prevention User Guide Before you start, print these instructions User Guide Replacing devices Replacing a memory module Replacing devices Replacing the keyboard Replacing devices Installing the keyboard Replacing devices User Guide Replacing devices User Guide Be gentle with your computer Troubleshooting computer problemsBe careful about where and how you work Taking care of your computerCleaning the cover of your computer Computer stops responding Cleaning your computer displaySpills on the keyboard Memory module problemsNetworking problems Ethernet problemsSolution Wireless LAN problemProblems with the keyboard and other pointing devices An UltraNav pointing device problemKeyboard problems Problems with the display and multimedia devicesComputer screen problems Audio problems External monitor problemsBattery and power problems Battery problemsPower problems Sleep problems Power button problemUser Guide Getting help and service Getting supportBefore you contact Lenovo Lenovo Support Web site Calling LenovoTelephone numbers Finding ThinkPad options Purchasing additional servicesUser Guide Appendix A. Regulatory information Wireless related informationLocation of the UltraConnect wireless antennas Wireless interoperabilityFederal Communications Commission Declaration of Conformity Locating wireless regulatory noticesExport classification notice Electronic emission noticesAppendix A. Regulatory information User Guide Important Weee information Appendix B. Weee and recycling statementsUser Guide Appendix C. Energy Star model information Power plan Energy Saver settings when plugged into ac powerUser Guide Appendix D. Notices Trademarks Page Part Number Printed 1P P/N
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