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USB Troubleshooting Bible - Advanced

Article ID: 582413686
Last updated: 07 Dec, 2012
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USB MIDI Cable - FAQs

USB Troubleshooting Bible - Advanced
While the following techniques apply mostly to Win 9x, some of the concepts 
(such as the BIOS Settings) may also help resolve issues in Win XP. This info
is offered as a courtesy on an AS IS basis and VTB makes no warranties and
bears no responsibility for issues that may result for your use of this info.
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USB Connectivity Requirements:
To achieve proper USB connectivity six basic system elements must be present
and working correctly.
1) Support from the BIOS
2) Support from the Operating System
3) Physical USB ports
4) A USB Device
5) The correct USB cable for the device
6) Drivers either from the OS and/or the peripheral maker

*****************************
Does my Computer Support USB?
There are two programs available to check if your system is USB ready.
Although, neither of these programs is a guarantee that your computer will
provide trouble-free USB, both provide good indications of capability.

- Intel USB Check:
http://www.usbman.com/WebDrivers/Intel%20USB%20System%20Check/USBREADY.EXE

- Entrega USB Ready:
http://www.usbman.com/WebDrivers/Entrega%20USB%20Ready/USBREADY.EXE

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Identify the USB Host Controller:
All USB host controllers are NOT created equal. You should identify the
USB host controller type so that you will know how to proceed if you have
problems. For a "How To", go here:
Host Controller PCI / USB - How to identify - Win9X
http://www.usbman.com/Guides/HowTo_Identify_HostController.htm

*****************************
Cleanup the Device Manager / Windows Safe Mode:
From initial installation problems to suddenly not working USB, cleaning up
the Device Manager in Safe mode is the first step in Win9X troubleshooting.
Many hardware related problems in Windows can be traced to ghost and/or
duplicate device entries. Obsolete and/or duplicate devices can ONLY be
seen and removed from the Device Manager while in Windows Safe Mode.
For a good "How To", see here:
Clean-up Device Manager in SAFE MODE - Win9X:
http://www.usbman.com/Guides/Cleanup%20Device%20Manager%20Safe%20Mode.htm

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BIOS: Common BIOS Problems:
Many USB Problems are the result of improper settings in the BIOS. To
achieve proper USB connectivity the BIOS needs to be a properly working
partner.

BIOS: Enable USB in the BIOS:
USB is often disabled by Default in the BIOS. To enable USB in the BIOS
one or more of the following statements must be true.

BIOS: USB Keyboard - DOS or Enabled (Even if you have NO USB Keyboard)
Legacy USB Support - Enabled
and/or
Assign IRQ for USB - Enabled (Some combinations of OS and BIOS version
require this setting to be Disabled).
If there are NO references to USB in the BIOS setup, your BIOS Version Needs
To Be Updated.

BIOS: The BIOS version does NOT support USB:
Vintage 1996-97 motherboards, even those with USB pinouts (AT Style) almost
always require a BIOS update to achieve proper USB connectivity. Generally,
a BIOS date of June 1998 or newer is required for Win9x systems. A BIOS
date of October 1999 or newer is usually required for systems running
Windows 2000. New Operating Systems require new BIOS revisions.

***
BIOS: BIOS Help Links:

BIOS Agent - Free Software Reports Your BIOS Details and Configuration
http://www.unicore.com/biosagent/ba.exe

BadFlash - Good Information and Help
http://www.badflash.com/

CTBIOS - Small DOS program that identifies the BIOS and motherboard -
Program is in German but, you'll get the idea
http://www.usbman.com/WebDrivers/CTBIOS/ctbios15.zip

Wim's Bios Page - BIOS Help Site
http://www.wimsbios.com/

USBMan BIOS Download Site - Listed by Manufacturer
http://www.usbman.com/Guides/bios_update_sites.htm var glosarry_items = new Array; glosarry_items[1] = '

USB

Universal Serial Bus (USB) is a way to connect peripheral devices to computers. It replaces the functionality of serial and parallel ports, including keyboard and mouse ports.

USB uses a bus topology, which means peripherals can be daisy-chained together or connected through hubs. Up to 127 devices may be connected together at one time, and devices may be connected and disconnected while the computer is in operation (hot-swapping).

To use USB peripherals, your computer must have either built-in USB capability or a USB expansion card installed. Your computer\'s operating system must be able to support USB as well.

USB devices are self-identifying, and USB is Plug-and-Play compliant, which means that installation and configuration of USB devices should be relatively easy. The current standard, USB 2.0, is backwards compatible with the earlier 1.0 and 1.1 standards. USB 2.0 supports bandwidths of 1.5Mbps, 12.5Mbps, and 480Mbps.

Peripherals that make use of USB connections include digital audio devices, telephony devices, cable boxes, printers, keyboards, mice, joysticks, digital cameras, and scanners.



\"external\"external

We carry 4 USB Extender Cables all of which function for both data and power.

TB450-2057-01 6 Foot X1 USB Extender Cable
TB410-1123-01 3 Foot AA Micro USB Extender Cable
TB450-1121-01 1.5 Foot AA Amigo USB Extender Cable
TB450-2130-01 6 Foot P21 USB Extender Cable
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