Toshiba Satellite L300 - 2.6 Keyboard

2.6Keyboard 2Troubleshooting
SatelliteL300D/L305D/SatelliteProL300D/EQUIUML300D/SATEGOL300DMaintenanceManual 2-15
2.6 Keyboard
Tocheckifthecomputer’skeyboardisdefectiveormalfunctioning,followthe
troubleshootingproceduresbelowasinstructed.

Procedure1TestProgramCheck
Procedure2ConnectorCheckandReplacementCheck

Procedure1TestProgramCheck

ExecutetheKeyboardtestavailableaspartofthemaintenancetestprogram.SeeChapter3
forinformationonhowtoperformthetest.
Ifanerrorisdetectedinthetest,gotoProcedure2.Ifnoerrorisdetected,thekeyboard
itselfisnormal.
Procedure2ConnectorCheckandReplacementCheck

Thekeyboardorsystemboardmaybedisconnectedorfaulty.Disassemblethecomputer
followingthestepsdescribedinChapter4andperformthefollowingchecks:

Check1 Makesurethekeyboardcablehasbeenfirmlyconnectedtothesystem
board.
Keyboard
Systemboard
CPU


 Ifthecableislooseoroff,reconnectitfirmlyandreturntoProcedure1.
Ifthereisstillanerror,performCheck2.

Check2 Thekeyboardmaybefaulty.Replaceitwithanewonefollowingthe
instructionsinChapter4.Iftheproblempersists,performCheck3.

Check3 TheSystemboardmaybefaulty.Replaceitwithanewonefollowingthe
instructionsinChapter4.Ifthekeyboardisstillnotfunctioningproperly,
performCheck4.
Check4 Thememorymaybedefective.Replacethememorymodulewithanew
onefollowingthestepsdescribedinChapter4.Iftheproblempersists,
performCheck5.

Check5 TheCPUmaybefaulty.Disassemblethecomputerfollowingthesteps
describedinChapter4andreplacetheCPUwithanewone.