
B–62075E/04
5. TROUBLESHOOTING
297
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?
(2)Causes and remedies
1 Power to the display is faulty. (Exchange power supply unit).
2 Cable connection is faulty. (Correct the connection).
3 Module is faulty (Exchange CRT control module)
4 Display is faulty.
* The CRT control module is mounted on the main CPU board or
option 1 board. The location of the module is described in:
Sections 2.5.2 to 2.5.5 : Main CPU board
Section 2.5.19 : Option 1 board
1234
STATUS f (f : on, : off)
When STATUS LED on the main board is other than above, check LEDs
on the main CPU board and other optional boards,identify the trouble and
make an appropriate action.
5.8
NOTHING IS
DISPLAYED ON CRT
Points
Judgement of the point
Causes and remedies
1. When the display system
is in toruble
2. When system is in
trouble