
B–62755EN/01
8.TROUBLESHOOTING
323
Check whether it is a trouble of display or a trouble of the system.
Check whether the STATUS LED on the main board shows the following
state.
1234
STATUS f (f : on, : off)
If the status shows the above state, the system is normal.
Therefore, display system may be faulty.
If the status shows other state, a hardware other than the display system
may be troublesome.
(1)Confirmation item
1) Is power supplied to the display?
2) Is a video signal connected? Isn’t it disconnected? or braked?
3) Is really nothing displayed? Isn’t the message meaning that
communication is impossible with VGA (GRAPHIC IS READY,
WAITING SERIAL BUS IS READY) displayed?
(2)Causes and remedies
If nothing is displayed:
1) Power to the display is faulty. (Exchange power supply unit).
2) Display is faulty.
If the message meaning that communication is impossible with VGA
is displayed:
1) Incorrect cable connection. (Correct the connection.)
2) Defective module. (Replace the HSSB control module.)
8.8
NOTHING IS
DISPLAYED ON CRT
Points
Judgement of the point
Causes and remedies
1. When the display system
is in toruble