Toshiba PSLCAX/PSLCBX, SATEGO L300D, EQUIUM L300D manual Display, Procedure1ExternalMonitorCheck

2￿￿Troubleshooting￿ 2.7￿￿Display￿

2.7￿ Display￿

To￿check￿if￿the￿computer’s￿display￿is￿defective￿or￿malfunctioning,￿follow￿the￿troubleshooting￿ procedures￿below￿as￿instructed.￿￿

Procedure￿1￿￿External￿Monitor￿Check￿

Procedure￿2￿￿Test￿Program￿Check￿

Procedure￿3￿￿Connector￿Check￿and￿Replacement￿Check￿

Procedure￿1￿￿External￿Monitor￿Check￿

Connect￿an￿external￿monitor￿to￿the￿computer's￿external￿monitor￿port,￿then￿boot￿the￿computer.￿￿ The￿computer￿automatically￿detects￿the￿external￿monitor￿even￿if￿resume￿mode￿is￿enabled.￿ If￿the￿external￿monitor￿works￿correctly,￿the￿internal￿LCD,￿LCD/FL￿cable,￿or￿FL￿may￿be￿faulty.￿￿ Go￿to￿Procedure￿3.￿ If￿the￿external￿monitor￿appears￿to￿have￿the￿same￿problem￿as￿the￿internal￿monitor,￿the￿system￿ board￿may￿be￿faulty.￿￿Go￿to￿Procedure￿2.￿

Procedure￿2￿￿Test￿Program￿Check￿

Insert￿the￿diagnostics￿bootable￿CD￿in￿the￿computer's￿CD￿ROM,￿turn￿on￿the￿computer￿and￿run￿ the￿test.￿￿See￿Chapter￿3￿for￿information￿on￿how￿to￿perform￿the￿test.￿ If￿an￿error￿is￿detected￿in￿the￿test,￿go￿to￿Procedure￿3.￿￿If￿no￿error￿is￿detected,￿the￿display￿itself￿ is￿normal.￿

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Procedure￿3￿￿Connector￿Check￿and￿Replacement￿Check￿

The￿display￿unit￿has￿an￿LCD￿module,￿Fluorescent￿lamp￿(FL),￿panel￿close￿switch￿and￿FL￿ inverter￿board.￿￿Any￿of￿the￿components￿or￿their￿connections￿may￿be￿defective.￿￿Disassemble￿ the￿computer￿following￿the￿steps￿described￿in￿Chapter￿4,￿then￿perform￿the￿following￿checks:￿

(1)￿ ￿￿If￿the￿FL￿does￿not￿light,￿perform￿Check￿1.￿

(2)￿ ￿￿If￿characters￿or￿graphics￿are￿not￿displayed￿normally,￿perform￿Check￿5.￿

(3)￿ ￿￿If￿the￿FL￿remains￿lit￿when￿the￿display￿is￿closed,￿the￿panel￿close￿switch￿may￿be￿ defective.￿￿Perform￿Check￿8.￿

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Check￿1￿ Make￿sure￿the￿following￿cables￿have￿been￿firmly￿connected￿to￿the￿system￿ board￿and￿FL￿inverter￿board.￿

FL

￿

FL￿inverter￿board

HV￿cable

System￿board

LCD/FL￿cable

CPU

￿

￿If￿any￿of￿the￿cables￿is￿loose￿or￿off,￿reconnect￿it￿firmly￿and￿return￿to￿

Procedure￿3.￿￿If￿there￿is￿still￿an￿error,￿perform￿Check￿2.￿

Check￿2￿ The￿LCD/FL￿cable￿may￿be￿faulty.￿Replace￿it￿with￿a￿new￿one￿and￿return￿to￿

Procedure￿3.￿￿If￿there￿is￿still￿an￿error,￿perform￿Check￿3.￿

Check￿3￿ The￿FL￿may￿be￿faulty.￿￿Replace￿it￿with￿a￿new￿one￿and￿return￿to￿Procedure￿

2-16￿Satellite￿L300D/L305D/Satellite￿Pro￿L300D/EQUIUM￿L300D/SATEGO￿L300D￿￿￿￿￿Maintenance￿Manual￿