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ERROR CODE and TROUBLESHOOTING

8 - 133

[C940] Engine-CPU abnormality

[C962] LGC board ID abnormality

[C963] Connection detection error between the IMG board and the LGC board

SYS board • Connector check (CN135)

• Board check

Replace parts Remarks

SLG board

SYS board

Classification Error item

Circuit related service call

Check item Measures

LGC board • Does service call still occur even after turning OFF the

main power switch then back ON?

• Check if the conductor pattern between the Engine-CPU

and FROM, SRAM is short circuited or open circuited.

Replace parts Remarks

LGC board

Classification Error item

Circuit related service call LGC board ID abnormality

Check item Measures

LGC board • Connector check (CN304, CN319, CN320, CN331)

• Board check

IMG board • Connector check (CN426, CN423, CN424, CN426)

• Board check

Switching regulator • Connector check (CN403)

Harness • Connector check

• Harness check

Replace parts Remarks

LGC board If the problem is not corrected with the replacement of the

LGC board, reinstall the removed LGC board and replace the

IMG board.

IMG board If the problem is still not corrected with the replacement of the

IMG board, reinstall it and ask a specialist to repair it.

(Abnormal ID)

Classification Error item

Circuit related service call 3.3V output from the IMG board not detected on the LGC

board

Check item Measures

Toshiba E-studio5540c Service Manual

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