Tektronix TLA715 Series, Service Manual

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Troubleshooting
6--42
TLA715 Dual Monitor Portable Mainframe Service Manual
Check for Common Problems
Use Table 6--2 to quickly isolate possible failures. The table lists problems
related to the instrument and possible causes. The list is not exhaustive, but it
may help you eliminate a problem that is quick to fix, such as a blown fuse or
loose cable.
Table 6--2: Failure symptoms and possible causes
Symptom Possible cause(s)
Portable mainframe will not
power on
H
Power cord not plugged in.
H
Failed fuse.
H
Faulty power supply.
H
Faulty backplane board.
H
Faulty module.
Front panel light comes on
(mainframe powers on), but
one or more fans will not
operate
H
Faulty fan cable.
H
Defective fan.
H
Faulty power supply.
Controller appears “dead”;
power light comes on, but
monitor screen(s) is (are)
blank, mainframe emits no
beeps
H
SO DIMMs incorrectly installed or missing.
H
Defective controller board.
External monitor does not
power on
H
Monitor power cord not plugged in.
H
Monitor connected to Secondary Video Out and the Dual
Monitor operation not enabled.
H
Failed fuse.
H
Monitor failure.
External monitor powers on,
but is blank
H
External monitor controls turned down.
H
Monitor cable faulty or not connected to mainframe.
H
Monitor defective.
External monitor powers on,
but nothing is displayed on
screen
H
Monitor connected to Secondary Video Out and the Dual
Monitor operation is enabled. Drag items from desktop of
Primary Video Out to desktop of Secondary Video Out.
Hard disk drive related
symptoms
H
Defective hard disk drive.
H
Incorrect hard disk type selected in the BIOS setup.
H
Replaceable hard disk drive not installed.
H
Corrupted controller BIOS module firmware, reinstall
firmware.
H
Controller BIOS setup problem. See BIOS Settings.
H
Replaceable hard disk drive or optionally field installed fixed
hard disk drive not configured as bootable (slave) master
hard disk drive.