Lenovo W700ds manual Errors without messages, Problem

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If one of the following error code messages is displayed on the screen, have the computer serviced:

02F4: EISA CMOS not writable

02F5: DMA test failed

02F6: Software NMI failed

02F7: Fail-safe timer NMI failed

Fan error

Thermal sensing error

Errors without messages

Problem:

When I turn on the machine, nothing appears on the screen and the machine does not beep while starting up.

Note: If you are not sure whether you heard any beeps:

1.Turn off the computer by pressing and holding the power switch for 4 seconds or more.

2.Turn it on and listen again.

Solution:

1.Make sure that:

vThe battery is installed correctly.

vThe AC adapter is connected to the computer and the power cord is plugged into a working electrical outlet.

vThe computer is turned on. (Turn the power switch on again for confirmation.)

2.If a power-on password is set:

a.Press any key to display the prompt for the power-on password. If the brightness level of the screen is low, increase it by pressing the Fn+Home.

b.Type the correct password and press Enter.

3.If these items are set properly, and the screen remains blank, have the computer serviced.

18ThinkPad® W700 and W700ds Service and Troubleshooting Guide

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Contents ThinkPad W700 and W700ds Service and Troubleshooting Guide Page ThinkPad W700 and W700ds Service and Troubleshooting Guide Page Contents Trademarks Index Read this first Protect yourself from the heat that your computer generatesProtect the cables from being damaged Finding information This guide and other publicationsFinding information with the ThinkVantage button Important tips Be careful about where and how you work Taking care of your ThinkPad computerConnect the internal modem correctly Be gentle with your computerRegister your computer Carry your computer properly Handle storage media and drives properlyCare for the fingerprint reader Take care in setting passwordsBe sure not to modify your computer Cleaning your computer display Cleaning the cover of your computerCleaning your computer keyboard Tips on using the dual screen model ThinkPad W700 and W700ds Service and Troubleshooting Guide How can I prevent problems with my ThinkPad computer? Solving computer problemsFrequently asked questions Where are the recovery discs?How can I contact the Customer Support Center? Entering the Bios Setup UtilityWhere can I find warranty information? Diagnosing problems HDD diagnostic programTroubleshooting Click Diagnose hardwareError messages Message SolutionMessage Solution Message Solution Message Solution Beep errors Errors without messages ProblemScreen goes blank while the computer is on Memory problems Password problemsKeyboard problems Pointing device problemsSleep standby or hibernation problems Computer enters sleep standby mode unexpectedly Computer screen problems Click Advanced Settings Solution For Windows XP Click AdvancedBattery problems AC adapter problemsHard disk drive HDD or solid state drive SSD problems Problem Fingerprint reader problems Startup problemsProblem RAID problems Solution For using Intel Matrix Storage Manager option ROM ThinkPad W700 and W700ds Service and Troubleshooting Guide Solid state drive SSD Recovery optionsIntroducing Rescue and Recovery Restoring the factory contents from the service partition Restoring the factory contents using the recovery discs ThinkPad W700 and W700ds Service and Troubleshooting Guide Replacing the battery Upgrading and replacing devicesUpgrading the hard disk drive or solid state drive Handling an HDD or an SSDTo replace the HDD ThinkPad W700 and W700ds Service and Troubleshooting Guide Upgrading and replacing devices To replace the SSD Upgrading and replacing devices ThinkPad W700 and W700ds Service and Troubleshooting Guide To install an SO-DIMM Replacing memory2 Upgrading and replacing devices ThinkPad W700 and W700ds Service and Troubleshooting Guide Getting help on the Web Calling the Customer Support Center Getting help and serviceGetting help and service FRU Country or Region Telephone Number Getting help around the worldWorldwide telephone list Country or Region Telephone Number Country or Region Telephone Number Country or Region Telephone Number Country or Region Telephone Number ThinkPad W700 and W700ds Service and Troubleshooting Guide Appendix A. Warranty information Courier or Depot Service Types of warranty serviceCustomer Replaceable Unit ″CRU″ Service On-site Service Customer Carry-In or Mail-In Service Product Exchange ServiceThinkPad W700 and W700ds Service and Troubleshooting Guide Appendix B. Customer Replaceable Units CRUs Optional-service CRUs Appendix C. Features and Specifications FeaturesSpecifications Battery life Power source AC adapterBattery pack Heat outputThinkPad W700 and W700ds Service and Troubleshooting Guide Appendix D. Notices Federal Communications Commission FCC Statement Export classification noticeElectronic emissions notices European Union EMC Directive conformance statement Industry Canada Class B emission compliance statementAvis de conformité à la réglementation d’Industrie Canada ThinkPad W700 and W700ds Service and Troubleshooting Guide Informationen in Hinsicht Emvg Paragraf 4 Abs Energy Star model information Windows XP Windows Vista Power plan Energy Star at AC mode Been inactive for a specified length of timeClick OK Trademarks ThinkPad W700 and W700ds Service and Troubleshooting Guide Index Troubleshooting battery 27 computer screen 24 error messages Page Part Number 45N3646