GE Datex-Ohmeda Aisys Carestation Reference Manual page 212

Aisys
Display Troubleshooting
Check power to ACB
Yes
Download New / All
7
Flowchart
7-30
Does the Screen display the
company logo or any information?
Boot-up with
System Download
Card
Does Display
boot normally?
Yes No
Check for DU
12.5v; On PCB J3
Is 12.5v from
PCB "OK"?
No
Troubleshoot Power
Problem
Yes
Replace the DU
CPU Board
Yes
Replace the PCB
Start
Turn on System
Use Flashlight to
Illuminate Display.
Can information be
seen?
No Yes
Pin 4 - 15
Problem Solved
Is 12.5v within
Limit(12.5 ±
0.18V)?
No
Yes
Check for On/Standby
Switch signal; On PCB
J4 Pin 2 - 10
Measured Voltage
> 2.5v in Standby
state and < 1.3v in
ON state?
No
Check On/Standby
• Switch Connections
• Operation
• Associated harness connections
Check Contrast
Adjustment in
Screen Set-up
Problem
continues?
Yes
Check / Replace
Backlight tubes,
cables, and
inverters
No
Problem
continues?
No
Yes
Replace the DU
CPU board
Is the Green Power Indicator
on Dashboard illuminated?
No
Ensure Mains Power is
connected. If connected,
Troubleshoot the Power
Inlet problem.
04/08 M1046983