Toshiba Qosmio F50 manual Procedure3 Connectorandreplacementcheck

2￿Troubleshooting￿Procedures￿

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

The￿FL￿inverter￿board,￿LCD￿module,￿and￿system￿board￿are￿connected￿to￿the￿display￿circuits.￿￿ Any￿of￿these￿components￿may￿be￿damaged.￿￿Refer￿to￿Chapter￿4,￿Replacement￿Procedures,￿for￿ instructions￿on￿how￿to￿disassemble￿the￿computer￿and￿then￿perform￿the￿following￿checks:￿

Check￿1￿ Make￿sure￿the￿DDR￿RAM￿module￿is￿seated￿properly.￿Test￿display￿again.￿If￿the￿ problem￿still￿exits,￿replace￿the￿DDR￿RAM￿module.￿If￿the￿problem￿still￿exists,￿ perform￿Check￿2.￿

Check￿2￿ Replace￿the￿FL￿inverter￿board￿with￿a￿new￿one￿and￿test￿display￿again.￿￿If￿the￿ problem￿still￿exists,￿perform￿Check￿3.￿

Check￿3￿ Replace￿the￿LCD￿module￿with￿a￿new￿one￿and￿test￿display￿again.￿￿If￿the￿problem￿ still￿exists,￿perform￿Check￿4.￿

Check￿4￿ Replace￿the￿LCD/FL￿cable￿with￿a￿new￿one￿and￿test￿display￿again.￿￿If￿the￿problem￿ still￿exists,￿perform￿Check￿5.￿

Check￿5￿ Replace￿the￿CPU￿with￿another￿of￿the￿same￿specifications.￿￿If￿the￿problem￿still￿ exists,￿perform￿Check￿6.￿

Check￿6￿ The￿system￿board￿may￿be￿damaged.￿￿Replace￿it￿with￿a￿new￿one.￿

QOSMIO￿F50-￿QOSMIO￿F55-￿DYNABOOK￿QOSMIO￿F50￿Series￿Maintenance￿Manual￿ ￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿16￿