Tektronix 070-9778-03, Service Manual

Page: 83 / 119

Troubleshooting
TLA 711 Color Benchtop Controller Service Manual
6–31
With mainframe
powered off, insert
benchtop controller
into slot 0 and 1
Turn on power
Monitor
powers on?
Yes
No
Controller appears
”dead” (dead screen –
no beeps)?
Possible cause:
1. Verify monitor power
cord is plugged in
2. Failed fuse
3. Defective monitor
Yes
Possible cause:
1. SIMMs incorrectly
installed or missing
2. Defective controller
board
No
Monitor
display is
blank?
Yes
Possible cause:
1. Monitor cable detective or not
connected to mainframe
2. External monitor controls
turned down
3. Defective monitor
BIOS error
message?
Yes
See BIOS error
code table 6–9 on
page 6–35
Run QAPlus/WIN
(See page 6–28 for
instructions)
Passes all
tests?
No
Repair/replace failed part
identified by QAPlus/WIN
Run TLA700 mainframe diagnostics
(see page 6–29 for instructions)
Passes all
tests?
No
Controller board
defective
Start
No
Yes
Yes
No
Windows95
Boots?
No
Consult the troubleshooting
section of your Microsoft
Windows 95 manual
Yes
If the TLA 700 Application is not
already running, start it from the
START menu.
TLA
Application
starts?
No
Reinstall TLA software
(see Installation manual)
Done
Yes
Figure 6–9: Primary troubleshooting tree