Apple 1705 用户手册

 

 Troubleshooting

Symptom Charts/Video - 8

 

Screen flickers

1 Check the monitor cable connections. The thumbscrews 

must be tightened securely. If a video card is used, the 

monitor cable must be secured to the card.

2 Check for external interference by moving the monitor to 

another location.

3 If using more than one monitor with a computer, move the 

monitors so they are least 18 inches apart.

4 If a video card is used, check the refresh rate. Refresh 

rates below 60 Hz may cause flicker. See the video card 

manual to raise the refresh rate above 60 Hz.

5 Doublecheck items 1 through 4.

6 Replace the video and main deflection boards. See “Main 

Deflection, CRT/Video Boards and Rear Fence” in Take 

Apart. Adjust cutoff and white balance. See “Cutoff and 

White Balance” in  Adjustments.