HP printer and scanner not workin on the same system

[dfailure]

I have a system that has three HP products intall on it

1. HP LaserJet 2015
2. HP ColorLaserJet 2605
3. HP Scanner 5550c.

Now the problem is all of them are connected via USB port.

The driver of all of these products are installed perfectly and the system shows the devices in the ready state without any problems.

As we start to take print outs None of the printers are givng printing as well as even the scanner is not scanning .

but when i remove the USB cable of one of any devices given above it starts to work fine.The USB cables of all the three devices are in good working state

But when i plug the unpluged USB of the device it shows USB unrecognized. dont know wats heppening but all the three devices are working abnormally.
Plz help!!
thankyou

 

[wahnula]

when i remove the USB cable of one of any devices given above it starts to work fine

Please explain this statement in a little more detail.

Tony

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