Lenovo ThinkPad Edge E420 - Page 153

Solution:TheextendedRAMfailed.Testyourcomputer'smemorywith“LenovoThinkVantageToolbox”
onpage131.Ifyouhaveincreasedmemoryjustbeforeturningthecomputeron,reinstallit.Thentest
thememorywithLenovoThinkVantageToolbox.
•Message:0250:Systembatteryerror.
Solution:Thebackupbattery,whichisusedtopreservethecongurationinformation,suchasthedate
andtime,whilethecomputeristunedoff,isdepleted.ReplacethebatteryandrunThinkPadSetupto
verifytheconguration.Ifyoustillhaveaproblem,havethecomputerserviced.
•Message:0251:SystemCMOSchecksumbad.
Solution:ThesystemCMOSmighthavebeencorruptedbyanapplicationprogram.Thecomputeruses
thedefaultsettings.RunThinkPadSetuptorecongurethesettings.Ifyoustillseethesameerrorcode,
havethecomputerserviced.
•Message:0260:Systemtimererror.
Solution:Havethecomputerserviced.
•Message:0270:Realtimeclockerror.
Solution:Havethecomputerserviced.
•Message:0271:Dateandtimeerror.
Solution:Neitherthedatenorthetimeissetinthecomputer.Setthedateandtime,usingtheThinkPad
Setup.
•Message:0280:Previousbootincomplete.
Solution:Yourcomputerwaspreviouslyunabletocompletethebootprocess.
Turnthecomputeroff;thenturnitontostarttheThinkPadSetup.Verifythecongurationandthen
restartthecomputereitherbychoosingtheExitSavingChangesoptionundertheRestartitemor
bypressingF10.
Ifyoustillseethesameerrorcode,havethecomputerserviced.
•Message:02D0:Systemcacheerror.
Solution:Thecacheisdisabled.Havethecomputerserviced.
•Message:02F4:EISACMOSnotwritable.
Solution:Havethecomputerserviced.
•Message:02F5:DMAtestfailed.
Solution:Havethecomputerserviced.
•Message:02F6:SoftwareNMIfailed.
Solution:Havethecomputerserviced.
•Message:02F7:Fail-safetimerNMIfailed
Solution:Havethecomputerserviced.
•Message:1802:Unauthorizednetworkcardispluggedin-Poweroffandremovethenetworkcard.
Solution:TheminiPCIExpressnetworkcardisnotsupportedonthiscomputer.Removeit.
•Message:1803:Unauthorizeddaughtercardispluggedin-Poweroffandremovethedaughtercard.
Chapter10.Troubleshootingcomputerproblems135