Question about HP 640 Inkjet Fax Machine
I have an HP 640 fax machine thats been unplugged for about a month. When I plugged it in again, it just shows bars across the display and I can't get it to do anything. Any suggestions?
While the printer is powered on.....unplug the power module and then press and hold the # 3 button at the same time......while holding the two buttons reconnect the power module......will fix the problem.
Posted on Jun 01, 2010
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Posted on Jan 02, 2017
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