| Problem |
Possible Cause(s) |
Suggested Resolution(s) |
| No sound when turned on or no
power to the LED light |
- Power
cord loose, or no AC
- Bad
power supply in Logic Unit
|
-
Replace AC power cord and verify source power ok.
-
Replace logic unit
|
| Power OK but no video
displays |
- Monitor is turned off
- Loose or unplugged video connector
- Monitor adjustment turned too low to
view screen
|
- Turn on monitor
- Reseat the video connector
- Adjust knobs on monitor
|
| Cursor in the upper right of
screen |
- No signal received on twinax line, or
wrong address in terminal setup
- Cursor upper right after
troubleshooting address and twinax signal
|
- Detach
Y-conn, restart, when cursor upper right, press Alt+CMD12, (will get
inverse video) Reconnect twinax y-conn cbl. if screen changes, try a
different address, if screen stays the same (inverse video), still no
signal...change BALUN, patch cbl, or twinax cable.
- Move
base LU only to different location, if pbm. follows base, replace base, if
pbm. stays at location, go to troubleshoot cables, and addresses again.
|
| Cursor is in the upper left
(no characters appear when typing) |
|
- Check the entire line and see where the
cable break or disconnected cable is.
|
| Cursor is in the upper left
(characters appear when typing) |
- Twinax cable is bad or weak
|
- Check the entire line and see where the
cable break or disconnected cable is.
|
| Cursor bounces from left to
right |
- Terminal attempting to connect to a
used (active) address
|
- Change the address in the terminal
setups to an unused address
|
| Keyboard works but strange
(or wrong) characters appear on the display |
- Keyboard is loose or not properly
connected
- Bad keyboard
- Keyboard type is not matched on the
host or remote control unit (remote controller)
|
- Verify cable connection to Logic Unit
- Replace keyboard
- Check terminal setups
|
| Garbage (strange characters)
appear throughout the screen |
- Twinax cable or end is weak or damaged
|
- Test and replace problem twinax end(s)
|
| Keyboard won't respond and
logic unit beeps when typing |
- An error messages is flashing in the
lower left corner
- Macro recorder was left on, shows R????
below status line
- A key on the keyboard is jammed or
being held down by an object
|
- Press the reset key
- Delete the problem Funtion-Key (CMD) or
turn off macro record function
- Swap keyboards
- Sign-off terminal then cycle power
|
| Terminal session drops line,
reboots to sign-on screen losing all activity |
- Check power cable voltage
- Low power or electrical problem
- Problem twinax cable
- Twinax end is loose
|
- Swap power cables
- Move terminal power cable to different
outlet
- Replace twinax end
- Replace twinax cable
|
| Terminal causes other terminals on line to fail |
- Configured address may already be in use by another device
- Twinax line or connector may not be terminated
|
- Replace twinax Y or T connector
- Check for cable or twinax end problem
- Move logic unit to another port on the AS400. If problem follows
base replace unit
|
| Terminal drops off line to cursor in upper right |
- Defective or loose twinax end
- Defective cable
|
- Check lines, ends and baluns to see if one is loose or weak.
|
| Terminal drops offline to cursor in the upper left and
characters appear when typing |
- Terminal lost power or was turned off/on while still in use
|
- Vary off, cycle power then vary on the terminal.
- If it still doesn't work vary the device off, delete the device
description then cycle power to let it be configured again
|
| Terminal makes a buzzing sound |
|
|
| Terminal beeps constantly when turned and gets no video |
- Ram memory is damaged or loose from memory slot
|
- Reseat then replace memory chips
|
| Blank screen when using passthru but works OK when local |
- Wrong display emulation selected
|
- Reconfigure terminal to 132 column emulation (3197D, 3477, 3486, 3487
or 3488)
|
| 5488V drops offline back to signon screen when using shared
addressing |
- Wrong emulation type selected
|
- Delete the device descriptions for the terminal displays then let
autoconfig recreate them
|
| Terminal will not exit setup screen |
- Printer session configured but no display session
|
- Cycle power to logic unit. Hold down spacebar during reboot to
enter setups and correct the error
|
| Attached printer will not print |
- No printer session configured
- Printer session and device configures on host but doesn't print
|
- Configure printer session in terminal setups
- Troubleshoot cable and printer
|
| Attached printer will not print and cannot start writer |
|
- Verify that the printer ready light is on
|
