Question about HP DeskJet 3740 InkJet Printer
When the unit is switched on there is a loud ratchet type noise for about five seconds. The noise is repeated when selecting a print 'job' The unit works perfectly for the period of that printing.
The noise is coming from the left hand end immediately behind the operating switch.
The noise is loud and disturbing.
Hello Warbie2 ,
Your issue may be the laser/scanner motor. Usually sound like a jet engine warming up when starting to print and then has a whinning down sound after the paper has printed. Usually you need to replace the complete laser/scanner assembly. On some models the shaft of the motor can be lightly lubricated but I yours I do not think so and if you use to much you will destroy the optics.
Posted on Mar 24, 2008
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Posted on Jan 02, 2017
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