Toshiba e-STUDIO 2555C Service Manual page 704

[C940] Engine-CPU abnormality
Classification
Circuit related service call
Check item
Main power switch
Engine-CPU, FROM, and SDRAM
LGC board
Replacement part
LGC board
[C962] LGC board ID abnormality
Classification
Circuit related service call
Check item
Error code
LGC board
SYS board
Replacement part
LGC board
SYS board
[C964] LGC board boot process abnormality
Classification
Circuit related service call
Check item
LGC board
Replacement part
LGC board
e-STUDIO2555C/3055C/3555C/4555C/5055C
ERROR CODE AND TROUBLESHOOTING
Engine-CPU abnormality
Turn OFF the main power switch, then back ON.
Check if the conductor pattern between the Engine-CPU,
FROM is short circuited or open circuited.
Check if the conductor pattern between the Engine-CPU,
SDRAM is short circuited or open circuited.
Board check
LGC board ID abnormality
• Turn the power OFF and then back ON using the main
power switch, and then check if the error code changes to
another one.
• If it changes to another one, follow the procedure for the
changed error code
• Connector check (CN350)
• Board check
• Connector check (CN128)
• Board check
LGC board boot process abnormality
Turn the power OFF and then back ON using the main power
switch. If the same error occurs again, replace the LGC board.
© 2012-2013 TOSHIBA TEC CORPORATION All rights reserved
8 - 148
Contents
Measure
Measure
Contents
Measure
Measure
Contents
Measure
Measure