NCR POS XR8 - Page 89

Diagnostics 4-79
Current
System
Operation
Suspect
Component/
Failure
Terminal
State
Disk
Activity
LED
Power LED Debug Path
POST CPU CPU not
Operating
ON ON • Check for correctly
installed CPU
• Replace Motherboard
POST BIOS Chip BIOS
Checksum
Failure
Flashing
(4/Sec)
ON • Perform BIOS crisis
recovery
• Replace BIOS chip
• Replace Motherboard
POST Memory Memory
Issue
Flashing
(1/Sec)
ON • Check for properly
installed memory
• Replace memory
• Replace Motherboard
POST Motherboard No Display Flashing
1/4 Sec)
ON Replace Motherboard
POST Display
Motherboard
Peripheral
Stopped
Prior to Boot
Flashing
(1/Sec)
ON No Display:
1. Check for power to
display
2. Check cable connection
between Motherboard
and display
3. Check for properly
functioning display
4. Replace Motherboard
Display Working:
1. Use display to
determine failure point
via onscreen message
and BIOS Setup