Service manual

Troubleshooting
2 Troubleshooting
Contents
General Information................................................
2-l
Recommended Service Tools
........................................
2-l
Epson Authorized Replacement Modules.
.............................. 2-2
Power-On Diagnostics and Boot Errors.
...............................
2-3
Error Beep Codes
..................................................
2-6
General System Problems
........................................... 2-7
Power or Lock-up Problems.
........................................
2-7
Computer Doesn’t Start
..........................................
2-8
BlankScreen ...................................................
2-8
Power Supply Shut Down
........................................
2-8
Keyboard Problems.
...............................................
2-9
No Keyboard Response
..........................................
2-9
Sticking Keys
.................................................
2-10
Video Problems ..................................................
2-10
Blank Screen ..................................................
2-11
Incorrect Images ...............................................
2-11
Diskette Drive Problems.
..........................................
2-12
Operating System Error Messages
.................................
2-12
Diskette Drive Noise.
...........................................
2- 12
Hard Disk Problems
..............................................
2-13
Newly-installed Drive Problems.
.................................. 2- 13
Hard Disk Boot Failure
......................................... 2-14
System Software Problems.
........................................
2-14
Parallel Printer Problems
.......................................... 2-15
Serial Port Problems ..............................................
2-16
Option Card Problems
............................................
2-17
Memory Module Problems.
........................................
2- 18
Mouse Problems.
................................................
2-19
Troubleshooting with the NeXTSTEP Operating System
................. 2-20
Figures
Figure 2-l Power or Lock-up Problems
..............................
2-7
Figure 2-2 Keyboard Problems.
....................................
2-9
Figure 2-3
Video Problems.
......................................
2-10
Figure 2-4 Diskette Drive Problems.
...............................
2-12
Figure 2-5 Hard Disk Problems
...................................
2- 13
Figure 2-6 Software Problems
.................................... 2-14
Figure 2-7 Parallel Printer Problems
............................... 2-15
Figure 2-8 Serial Port Problems
...................................
2-16
Figure 2-9 Option Card Problems.
.................................
2-17
Figure 2- 10 Memory Module Problems
..............................
2- 18
Figure 2-11 Mouse Problems
......................................
2-19
Epson NX Service Manual
2-i