Display Panel Problems; No Video Output On Display Panel; Lines Or Blank Areas On The Display Panel; Table 4-2 Dc/Dc Converter Voltages - Sun Microsystems SPARCstation Voyager Service Manual

TABLE 4-2
Pin
6
7
8
9
10
3. Replace the DC/DC converter if any of the expected DC voltage is not present.
4. Replace the CPU board if DC voltages are still not present after replacing the DC/
DC converter. This may indicate a shorted component on the CPU board.

Display Panel Problems

No Video Output on Display Panel

1. Check the following connections to make sure they are secured:
Connection between the display panel and the video board
Connection between the flex cable and the video board
Connection between the flex cable and the CPU board
2. If a monitor is available, connect it to the 13W3 video port at the rear of the system
and power on the system. If data appears on the monitor, the video board is not
defective. Replace the display panel.
3. If no monitor is available to test the video board, replace the video board first and
retest the system. If video output is still not seen, replace the display panel.
Replace the CPU and the flex cable if the previous steps fail to restore the video.

Lines or Blank Areas on the Display Panel

1. If a monitor is available, connect it to the 13W3 video port at the rear of the system
and power on the system. If similar defects appear on the monitor, replace the
video board.
28 SPARCstation Voyager Service Manual • December 1994
DC/DC Converter Voltages
Wire Color
Brown
Brown
Blue
Yellow
Green
Description
Ground
Ground
Ground
+3.3V
BATT_RTN