Troubleshooting
6-- 64
TDS5000B Series Service Manual
Grounding TP1103 forces the transparent bridge and all components on the L2
PCI bus into reset. Ground TP1103 to determine if the instrument will boot to
Windows.
If Windows forces a safe boot mode, be sure to keep TP1103 grounded until
Windows is fixed in safe mode and can be booted up into normal mode. Once
Windows can be booted into normal mode, unground TP1103 and reset the unit.
This will enable the bus line previously grounded by TP1103.
Grounding TP1102 resets the 69000 video adapter. Note, neither the PC Interface
board VGA port or the LCD will function if TP1102 is grounded. Use the PC
motherboard SVGA port (see Figure 6--30 on page 6--65). This requires a
configuration change in the BIOS.
To enter the BIOS setup utility, do the following:
1. Restart Windows while holding down the F2 key.
2. Select Video Configuration from the Advanced Menu.
3. Set the Primary video adapter to AGP.
4. Exit the BIOS setup and save the changes.
If TP1102 is grounded before the video configuration is changed to AGP, reset
the screen by hitting CTRL -ALT-DEL twice. This resets Windows and TP1102.
5. When you are done troubleshooting, change the BIOS setting back to PCI.
NOTE. The 69000 video adapter located on the Tektronix PC Interface board is
the primary video adapter. A second video adapter is located on the PC
motherboard. The PC motherboard has an AGP video adapter and the 69000 is a
PCI bus video adapter. The 69000 is made the primary video adapter because it
can drive LCD panels. Tektronix forces the 69000 to be the primary video
adapter via BIOS setting Advance→ Video Configuration→ Primary Video
Adapter = PCI.
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