TITLE
    Multiple Scan Display: High Pitched Whine at Highest Resolution
Article ID:
Created:
Modified: 		17634
4/20/95
5/3/99
TOPIC

    I've noticed a high pitched whine emanating from my Multiple Scan 17 display. It seems to get worse when I change to the highest resolution. What can be done to resolve this issue?

DISCUSSION

    If the screen on the display is operating normally while the noise is occurring, then the problem is most likely related to a sub-harmonic of the horizontal sweep frequency, which is why the noise occurs only in one resolution.

    This suggests that the monitor's flyback transformer is probably the culprit. Replacement of the monitor's main board is the best way to resolve this issue; there are no adjustments to reduce or remove the noise.

    NOTE: This article applies to other Apple Multiple Scan Displays, such as the Multiple Scan 15 Display and Multiple Scan 20 Display .

Document Information
Product Area: Monitors-Displays
Category: Multiple Scan Displays
Sub Category: Multiple Scan 15 Display; Multiple Scan 17 Display; Multiple Scan 20 Display

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