Tektronix TLA715 Series, Service Manual

Page: 108 / 147

Troubleshooting
TLA715 Dual Monitor Portable Mainframe Service Manual
6--45
Remove modules
from portable
mainframe
Turn on power
Mainframe
powers on?
Yes
No
Mainframe appears
“dead” (dead screen -
no beeps)?
Possible cause:
1 Mainframe power cord is
not plugged in
2 Failed fuse.
3 Defective monitor
Flat-panel
display
blank?
Yes
Defective display,
defective interface board,
loose I/F board connector,
defective controller board
BIOS error
message?
Yes
See BIOS error
code, Table 6--5
on page 6--51
Run CheckIt
Diagnostic Software
Passes all
tests?
No
Repair/replace failed part
identified by CheckIt
Run TLA mainframe diagnostics (see
page 6--47 for instructions)
Passes all
tests?
No
Controller board
defective
Start
No
Yes
Yes
No
Windows
Boots?
No
Verify that Replaceable
hard disk drive is properly
installed.
Yes
If the TLA Application is not
already running, start it from the
Start menu.
TLA
Application
starts?
No
Done
Yes
No
External
monitor
blank, if
present?
Yes
Yes
No
External
monitor
attached?
No
Simulscan
enabled?
Reinstall TLA software
(see Installation manual)
Possible cause:
1 SO DIMMs incorrectly
installed or missing
2 Defective controller
board
Possible cause:
1 Monitor cable defective or not
connected to mainframe
2 External monitor controls
turned down
3 Defective monitor
External
monitor
display ok?
Defective controller board,
Defective external monitor,
Defective external monitor cable
Enable Simulscan
Refer to the BIOS setups
documented in the user
manual.
Yes
No
Yes
Yes
No
Yes
Beeps
No
Figure 6--22: Primary troubleshooting tree