Apple 5420/180 User Manual
![Apple](https://files.manualsbrain.com/attachments/2c022a7d1a76dcd8f02c04aa8d97faf41b63902f/common/fit/150/50/8a691e9df6162751590e2cef93a951cf3a39c94b6949421016232655b22d/brand_logo.png)
Troubleshooting
Symptom Charts/Video - 8
Single vertical or
horizontal line is
displayed
1 Replace analog/video board assembly.
2 Replace CRT.
Predominant color tint
or color cannot
be adjusted
1 Verify that video board is securely connected to CRT
socket.
2 Check cable connections to analog/video board.
3 If analog/video board is Rev A, replace internal RGB cable.
4 Replace analog/video board assembly. Perform video
adjustments (refer to “Video” in Adjustments chapter).
5 Replace CRT.
Picture breaks into
diagonal lines, or
picture rolls vertically
or horizontally
1 Perform geometry adjustments. Refer to “Geometry” in
Adjustments chapter.
2 Replace analog/video board assembly.