The usb ports on my v2000 no longer work. When I plug in any usb device it is not recognized.

If your device drivers are up to date, the USB ports are totally recognized. If the USB device plugged into the port is not initialized, it may not be recognized by the computer operating system. If a USB flash drive was working and no longer works; it could have been damaged when removed from the computer when last used. Flash drives are sensitive to Static Charge. Like when you rub the feet on a carpet and a spark of electricity jumps from a finger to another person. You must use the Eject method when removing Flash Drives.

Test to see if the computer sees another USB device like a keyboard, if it does, this means your USB port is working.
Plug the device into another computer, even go to a computer sales store and plug it into one there to see if it works. if it does not work, the KP25B is dead and needs to be replaced. if it does recognize it, then use a different USB port on the computer.

Solutions are in order of increasing probability of data loss AND device recovery.
Screen messages are loose approximations

A Soft Reset
1. Hold Power switch up for 5 seconds.
2. Screen displays "Goodbye".
3. Restart

B. Hard Reset
1. Hold Power Switch for 30 seconds
2. Restart

C. Recovery Mode
1. Hold Power Switch for 5 seconds to switch device Off
2. Move switch to Hold
3. Press and hold Home button
4. Connect USB cable to device
5. Screen displays "USB" in small type and "16 MB Format" shows up in My Computer
6. Copy firmware files to "16 MB Format" drive letter
7. Disconnect USB cable
8. Screen displays "Firmware update"
9. Restart device

C. Force Format (This one wipes the data partition. Make sure all needed music/pictures/video exist elsewhere)

1. Hold Power Switch for 5 seconds to switch device Off
2. Move switch to Hold
3. Press and hold top/North/up of Scroll Wheel
4. Connect USB cable to device
5. Screen displays "Format and lose data"
6. Press right/East on Scroll Wheel to confirm
7. Screen displays "Formatting"
8. Restart device

D. Manufacturing Mode (included for completeness only)
1. Hold Power Switch for 5 seconds to switch device Off
2. Move switch to Hold
3. Press and hold centre of Scroll Wheel button
4. Connect USB cable to device
5. Windows detects a new hardware device
6. ???
7. ???
8. ???

the usb port of my hp Compaq Laptop nc6000 no longer works properly. whenever i insert a flash it says usb device not recognized.

If you are using a multi port USB adapter that allows you to plug many devices into one USB port it may interfere with the scanner. Try uninstalling your Epson driver then download the newest one from the Epson website. http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?oid=88368&prodoid=63070478&BV_UseBVCookie=yes&infoType=Downloads&platform=All&x=27&y=14

Install the newest driver first then plug your scanner into a single USB port on the computer instead of the multi port.

its happen due to virus enfection which ifected ur drivers who recognize the device .
u can use two options first restore ur system on a previos good seting date .
other wise u have no option beside format
thanks.......

lm 358 falt

Does 1 Usb port work on your computer? Sometimes they can go out. Do you have a USB hub you can use?

It's either the USB port, the drive electronics itself, or the USB cable.

First I'd try a different USB cable.

I have the same problem with my Compaq Presario V2000. Lost both USB ports and HP tells me that the motherboard has to be replaced at $300 +..I searched and found a PCMCIA card with two USB ports for $10. No problems with the USB ports on this card..great and cheap solution.
My belief is that the compaq usb ports do not have power limiting circuitry therefore allowing you to overload the output power on the ports. My ports failed after I downloaded into a burglar alarm system I was programming.