User Interface Failure During Communication Via Service Port; Fixed Serial Or Ethernet Port Is Not Working - Honeywell CIU 888 Troubleshooting And Maintenance Manual

NOTE: Apart from replacing the CompactFlash Card, no field repairs are currently
FIGURE 3-5
NOTE: All fixed ports are part of the carrier board.
3 - 4
Hardware Troubleshooting
2. Install a new CompactFlash with a working image or have it installed.
possible.

3.4 User interface failure during communication via Service port

Problem
Communication between the CIU 888 and a PC/laptop connected to the
Service port of the CIU 888 has been established, but one of the
following occurs:
The CIU 888 display and the ring of light are inactive and the

navigation keys do not respond
Only the ring of light is activated

Only the CIU 888 display is activated

The navigation keys do not respond

Solution
Perform the following steps:
1. Check the display board:
a) Remove the cover on top of the CIU 888.
b) Check the display board for any signs of damage.
c) Replace a defective display board or have it replaced.

3.5 Fixed serial or Ethernet port is not working

Problem
A fixed serial or Ethernet port of the CIU 888 is not working (see
FIGURE 3-5).
CIU 888: Fixed ports
Troubleshooting & Maintenance Guide
CIU 888
Part No.: 4417594_Rev11