Tektronix MSO70000 Series Service Manual page 61

Table 4-6: Failure symptoms and possible causes (cont.)
Symptom
Front panel light comes on (instrument
powers on), but one or more fans will not
operate
Hard disk drive related symptoms
DVD-ROM related symptoms
Flat-panel display blank
BIOS error messages
MSO70000/C, DSA70000B/C, DPO70000B/C, DPO7000, MSO5000, DPO5000 Series
Troubleshooting (DPO7000 Series, MSO70000/C Series, DSA/DPO70000B/C Series)
Possible cause(s)
Faulty fan cable
Defective fan assembly
Faulty power supply
Faulty μATX Motherboard
Faulty CPU
μATX Motherboard power problem
Defective hard disk drive
Incorrect hard disk type selected in the BIOS setup
Replaceable hard disk drive not installed
Power supply failure
Corrupted BIOS module firmware, reinstall firmware
Loose cable
Corrupted OS image
Defective CDRW-ROM
Defective CDRW-ROM drive cable
Defective CDRW-ROM board
Incorrect CDRW-ROM configuration in the BIOS setup
Video adapter set to Integrated (connect monitor to μATX VIDEO port, enter
BIOS, set Video Adapter = PCI)
BIOS setting not Advance > Video Configuration > Primary Video Adapter = PCI
Defective cable from display adapter board to power interface board
Defective cable from inverter board to display adapter board
Defective cable from inverter board to backlighting display lamp
Defective backlighting display lamp
Faulty display
Faulty power interface board
Faulty power interconnect board
Faulty inverter board
Faulty display adapter board
Refer to the BIOS error message information
4–17