DEC VT1000 Service Manual page 56

48 Troubleshooting
Table 3–6 (Cont.) Troubleshooting the Terminal
Symptom Probable Cause
Screen Display Problems
System logic
board.
The screen The
display does not was pressed.
scroll. The hold
indicator is on.
The terminal
appears locked
and does not
respond to data
from the host.
The screen is CRT saver feature
blank. is activated.
ROM board.
Messages are XON/XOFF flow
garbled, and control is not
reverse question enabled.
marks appear on
the screen.
System logic
board.
The terminal Thermal
crashes after shutdown—fan
warming up. The is off.
screen goes blank
Power supply.
and power supply
LED turns off.
3 Section numbers follow the solution.
Solution
Replace the system logic board (4.6).
(Hold) key Press
F1 F1
Use the Commands pull-down menu
in the VTE window:
1. Click on Clear
Communications to clear
the terminal.
2. Click on Reset Terminal to
reset the terminal.
Press any key to restore the screen
display.
Replace the ROM board (4.5).
Click on the XOFF at 64 or 128
button in the Customize Host Port
or Customize Printer Port dialog
box.
Replace the system logic board (4.6).
Check the fan connector.
Replace the fan (4.8).
Replace the power supply (4.7).
3
to resume scrolling.