Table of Contents
Advertisement
INTRODUCTION
TROUBLESHOOTING
Symptom
No power indicator on circuit
Breaker off but indicator on
No disk I/O
Improper/ incomplete start-up
Start-up OK but no NIU
response (OIS12 only)
Start-up OK but no keyboard
response
Start-up OK but no CRT picture Check CRT AC power.
I-E96-107-2N
SECTION 6 - TROUBLESHOOTING
This section explains troubleshooting and testing IIOIS12 and
IIOIC12 components. It includes reference tables, component
tests and firmware tests. Replace components by following the
step-by-step procedures in
Be sure to follow all warnings, cautions and notes. Put boards
containing MOS devices into antistatic bags when stored or
shipped back to the factory. Do not repair printed circuit
boards in the field. All repairs and adjustments should be per-
formed by qualified personnel.
The console arrives ready for operation. After completing the
instructions given in
The troubleshooting guide in Table
of the more common problems and suggest solutions.
Table 6-1. Troubleshooting Guide
Possible Problem or Solution
No AC power at IIOIS12.
Check AC wiring on input.
Check AC on power entry panel.
Check breaker light on power entry panel.
Check power on indicator.
Check breaker contacts.
Check breaker wiring.
Check AC input wiring.
Check power switch on system unit.
Check cable from hard disk to controller card (OIS12 only).
Check that 3.5 inch disk drive latch is open and no disk is in the drive.
See diagnostic message at start-up for possible problems.
Check NIU cables. Diagnostics disabled, (port A at 19.2 Kbyte).
Check PC set up options to disable COM 2 port.
Try using NIU diagnostic port to test IIMCL01/IIMLM01/IIMCP0_ modules.
Check configuration of NIU enabled.
Check for duplicate node settings on the loop.
Check serial card and jumpers.
Check all cables.
Check caps lock position.
Check console configuration; printers and mylar keyboard enabled.
Check keyboard assignment.
Check CRT fuse.
Check cables.
Check graphics card.
Section
7.
Section
3, prepare the unit for service.
6-1
will help identify some
INTRODUCTION
6 - 1
Advertisement
Table of Contents
