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prevent parallel-to-USB printer going to sleep?

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I have an old HP Laserjet 4L that is plugged into my new-ish Dell via a USB parallel port - you know, just a cable with a Centronics on one end and a normal USB plug on the other. It works very well, except for if I leave the computer on for a long time, the printer appears to go into some kind of power save mode, but doesn’t come out of it when I want to print!

Even rebooting doesn’t always solve the problem, which is frustrating. This has never happened when plugging the printer into an actual parallel port. I am thinking, if I could somehow disable what I am assuming is some power-save ju-ju, that would solve the issue....maybe. I am in kinda new territory here.

Any solutions, other than waiting for a cheap-after-rebate laser printer on slickdeals/fatwallet/etc.?

NB: the USB/parallel adapter I am using was about $10. Possible defect in this device?
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Hi there

Try this :

Go to Start->Run and type devmgmt.msc <OK>
Locate the USB Controller branch in device manager & expand it. Look for an entry called 'USB Root Hub' (there may be more than one)
Right click on Root hub & select Properties
Click on the Power Management tab & clear the checkbox labelled 'Allow computer to turn off this device....'
Click OK

Repeat this procedure for any other root hub entries you have in device manager.

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