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Pl. connect the USB cable to the port(port mounted on system mother board.) at the back panel of the desk top pc. Try to implement maintenance operation fro the system program. follow the steps, if its display (Say USB not connected of device not connected) Then there is a problem with Main Board of the printer and its need replacement. (try with other system.
If your desktop has replaced mother board for any hardware cause then it also happen the printer main board gets damage th usb port.
Sounds like the Main mother board is the problem. When the processor chip overheats, the programming information passing through the chip slows down. Most cases, replacing the main mother board will fix the problem.
A router is basically a mini-computer that splits up one internet connections to 4 (or whatever # of ports you have).
Basic Connections to a router: A Router requires a internet connections, so your broadband modem must connect to the WAN port (theres only one) of the router DIRECTLY. Then Ethernet cables go from the router to the computers on the LAN ports. Don't do something weird like connecting your internet to your computer then your computer to the routers WAN port, it'll most likely mess up.
Once you have connected your router like this, it should work.
If your modem only has a usb port, I have no idea how to make that work out. Sorry. Try getting a new modem from your ISP, or check if your modem does have a ethernet port, if it does just connnect that to the routers wan port.
Also computers should not interconnect with each other with use of a router. Thats what the router is for. Everything gets connected and split up at the router, nothing connects to anything else but the router, basically.
Cable has changed it's policy and standards many times in the past
if you have a cable modem you will most certanly need to decide
if you're going to be using the cat5 ethernet connection or the USB connection cable
if you have an onboard ethernet adaptor or a PCI ethernet adaptor
it's best if you use the cat5 connection of the cable modem
if you have no ethernet adaptor , you will need to use the USB connection of the cable modem
and connect that to your computer , which will most deffinately require that you have working
USB ports and at least service pack 2 loaded to enable USB 2.0 , and a driver from the cable
modems driver CD
if you're using a router , use the cat5 connection of the cable modem
( make sure you contact your ISP to walk you through the setup proceedures )
They sell USB to Ethernet adapters that you can use. If you want to replace the adapter yourself you will have to strip the laptop down to the mother board, then proceed to de-solder then solder the new one back onto the board. You can but the replacement piece from either http://sparepartswarehouse.com if they have your make and model, or you can get it from your laptop's distributer.