What can cause the ATV58 drives display to fade out?

Issue:
Is there a remedy for a fading display on ATV58?

Product Line:
Altivar ATV58

Environment:
This has been found in keypads manufactured between the 6th week and 15th week of 2003.
Date codes on the back of the keypad are 0306 to 0315. The four digit date code is typically preceded by a letter such as G0149.

Cause:
Premature degradation of the display

Resolution:
For affected units, need to replace the keypad or possibly replace the entire drive, because the ATV58 drives are obsoleted.

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