Tektronix TLA 714, Руководство по обслуживанию, Страница: 101 / 159

Troubleshooting
4–54
TLA 714 Color Portable Mainframe Service Manual
Check for Common Problems
Use Table 4–2 to quickly isolate possible failures. The table lists problems
related to the portable mainframe 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 4–2: 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
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.
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
Benchtop chassis power supply failure, refer to the TLA 720
Benchtop Chassis Service Manual for troubleshooting
procedures.
H
Corrupted controller BIOS module firmware, reinstall
firmware. Refer to Upgrading Module Firmware in the TLA
714 and TLA 720 Installation Manual.
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 dsik drive.
H
Faulty benchtop controller.