Toshiba L500D manual Procedure1 Externaldisplaycheck, Procedure2 Diagnosticcheck

2￿Troubleshooting￿Procedures￿

This￿section￿describes￿how￿to￿determine￿if￿the￿computer’s￿display￿is￿functioning￿properly.￿￿ The￿process￿is￿outlined￿in￿Figure￿2-3.￿Start￿with￿Procedure￿1￿and￿continue￿with￿the￿other￿procedures￿as￿instructed.￿

Procedure￿1:￿ External￿display￿check￿

Procedure￿2:￿ Diagnostic￿check￿

Procedure￿3:￿ Connector￿and￿replacement￿check￿

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Procedure￿1￿ External￿display￿check￿

Connect￿an￿external￿display￿to￿the￿computer’s￿external￿monitor￿port,￿and￿then￿boot￿the￿ computer.￿￿The￿computer￿automatically￿detects￿the￿external￿display.￿￿

If￿the￿external￿display￿works￿correctly,￿the￿internal￿LCD￿may￿be￿damaged.￿Go￿to￿Procedure￿3.￿

If￿the￿external￿monitor￿appears￿to￿have￿the￿same￿problem￿as￿the￿internal￿monitor,￿the￿system￿ board￿may￿be￿damaged.￿￿Go￿to￿Procedure￿2.￿

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Procedure￿2￿ Diagnostic￿check￿

The￿Display￿Test￿program￿is￿stored￿on￿the￿computer’s￿Diagnostics￿disk.￿￿This￿program￿checks￿ the￿display￿controller￿on￿the￿system￿board.￿￿Insert￿the￿Diagnostics￿disk￿in￿the￿computer’s￿ floppy￿disk￿drive,￿turn￿on￿the￿computer￿and￿run￿the￿test.￿￿Refer￿to￿Chapter￿3,￿Tests￿and￿ Diagnostics￿for￿details.￿

If￿an￿error￿is￿detected,￿go￿to￿Procedure￿3.￿￿If￿an￿error￿is￿not￿detected,￿the￿display￿is￿functioning￿ properly.￿

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SATELLITE￿L500D￿/PRO￿L500D￿MAINTENANCE￿MANUAL￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿15￿