ScanJet 4890 light bar trips at the end of the scanning glass and not coming back in the beginning

My ScanJet 4890 sometimes does not work properly.  In preview mode, the light bar will sometimes travel to the end of the scanner with light on and not go back.  The engine receives a sharp wail.  I have to turn the scanner and then turn the GET the light bar to return to the starting position.  Sometimes, it works correctly.    How can I fix my scanner?

I found an unusual solution to my own problem.  I drilled a hole of the housing of the scanner.  Then when the light bar gets stuck, I push a pencil into the hold and kick the light bar.  The bar is moving on its own and returns to its storage position. So, I can continue without turning the scanner on/off.  I suspect that the engine needs to be replaced, I can do later if I can find one that suits.

Tags: Notebooks

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