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This article explains how to check if your computer provides sufficient USB, FireWire, or SCSI support.
You may have arrived at this article from a scanner troubleshooting article, or may simply wish to check if the computer system if suitable prior to installing an Epson scanner or printer.
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Your computer must be a Windows XP, or 2000 pre-installed model, or a Windows 98, Me pre-installed model that was formatted and installed with Windows XP, or 2000. For devices connected via USB, you may not be able to install the driver on a computer that does not meet these specifications. For details about your computer, contact your dealer. |
The first step is to open Device Manager. Follow the steps below:
Figure 1: The SCSI card is identified as 'Adaptec AHA-2930CU PCI SCSI Controller':
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An entry for a SCSI device does not mean that there is a SCSI interface port on the computer system to connect the scanner. There are different types of SCSI cards available such as storage controllers, RAID Controllers for SAS & SATA drives, and HBAs for SATA drives. |
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It is important that the computer system is unplugged from the power outlet when installing any add-in card on the motherboard to prevent electrical shock and possible damage to the computer system. For information on how to check/install the SCSI card, refer to the documentation that came with the SCSI card or your computer. As this problem may be related to the BIOS, Windows, or hardware we recommend that you contact your PC vendor, the manufacturer of the SCSI add-in card, and Microsoft for further support. |
If the SCSI controller is listed with an error, refer to the table below.
Device Manager uses the following symbols to provide information about a particular error condition with a specific system device:
Symbol | Definition |
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Indicates the device is in a problem state. A device that is in a problem state can be functioning. A problem code explaining the problem is displayed for the device. |
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Indicates a disabled device. A disabled device is a device that is physically present in the computer and is consuming resources, but does not have a protected-mode driver loaded. |
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Indicates that Windows was unable to locate the drivers for the device or the driver is not available. If listed under ![]() |
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On a device resource in Computer properties, indicates that the Use Automatic Settings feature is not selected for the device and that the resource was manually selected. Note that it does not indicate a problem or a disabled device state. |
You could use the Troubleshooting Wizard, if available, to help you diagnose and fix the problem.
If, after troubleshooting, the SCSI Controller is listed and identified in Device Manager without an error symbol, it should be ready to use with the scanner.
If, after troubleshooting, the SCSI Controller is still listed with an error or not identified, we recommend contacting your PC vendor, SCSI card manufacturer, or Microsoft for support. If you continue to experience problems with SCSI interface, you may need to check the configuration of the SCSI card BIOS. Contact Adaptec for support.
If you experience any of the following problems, you may need to investigate a possible IRQ conflict:
When the computer boots, a unique IRQ (interrupt request) is assigned to each hardware device that requires one. A device requires an IRQ if it can initiate an action or provide input to the computer. The SCSI card will be assigned an IRQ, as are devices such as your disc drives, mouse, and keyboard. The IRQ uniquely identifies that device as well as the software that controls it, and this is used by the computer. Some IRQs are reserved for specific device types, others are available for Windows to assign. Devices can share an IRQ in Windows without it causing a conflict generally as long as they are not used at the same time. If another device is sharing the same IRQ number, and both attempt to send information to the computer/are used at the same time, it will likely cause a conflict.
See the following Microsoft articles for IRQ support information:
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If the USB Universal Host Controllers device category does not exist, your Windows operating system does not provide USB support. No further troubleshooting is necessary at this point. In the event of this, contact your dealer for advice. Contact your PC vendor or Microsoft for support. |
Figure 1: The USB Host Controller is identified as 'Intel (R) 82801GB':
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There are known issues with the Via/Via Tech USB Controllers that may affect the detection, installation and communication of the scanner / printer with the computer. Microsoft released updates in the Service Packs, for both Windows 2000 and XP so ensure that your system is fully updated. The latest updates can be downloaded and installed through the Windows Update or Microsoft Update tool, available from http://windowsupdate.microsoft.com. |
An example of this is below - note how a specific name is not given, only 'Standard Enhanced PCI to USB Host Controller'.
Figure 2: The USB Host Controller is not identified:
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In the event of this, you could try updating the driver in Device Manager. Right-click on the USB Host Controller and left-click on 'Update Driver'. Select the option to connect to Windows Update, and follow the Hardware Update Wizard to update the driver. Repeat this step for any unidentified USB Host Controllers. Microsoft Support: http://support.microsoft.com/ |
Device Manager uses the following symbols to provide information about a particular error condition with a specific system device:
Symbol | Definition |
---|---|
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Indicates the device is in a problem state. A device that is in a problem state can be functioning. A problem code explaining the problem is displayed for the device. |
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Indicates a disabled device. A disabled device is a device that is physically present in the computer and is consuming resources, but does not have a protected-mode driver loaded. |
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Indicates that Windows was unable to locate the drivers for the device or the driver is not available. If listed under ![]() |
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On a device resource in Computer properties, indicates that the Use Automatic Settings feature is not selected for the device and that the resource was manually selected. Note that it does not indicate a problem or a disabled device state. |
You could use the Troubleshooting Wizard, if available, to help you diagnose and fix the problem.
If, after troubleshooting, the USB Universal Host Controller is listed and identified in Device Manager without an error symbol, it should be ready to use.
If you experience any of the following problems, you may need to investigate a possible IRQ conflict:
When the computer boots, a unique IRQ (interrupt request) is assigned to each hardware device that requires one. A device requires an IRQ if it can initiate an action or provide input to the computer. The Universal Serial Bus Controllers will be assigned an IRQ (they normally share the same IRQ), as are devices such as your disc drives, mouse, and keyboard. The IRQ uniquely identifies that device as well as the software that controls it, and this is used by the computer. Some IRQs are reserved for specific device types, others are available for Windows to assign. Devices can share an IRQ in Windows without it causing a conflict generally as long as they are not used at the same time. If another device is sharing the same IRQ number, and both attempt to send information to the computer/are used at the same time, it will likely cause a conflict.
See the following Microsoft articles for IRQ support information:
Figure 1: The IEEE 1394 Bus host controllers is listed
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If the IEEE 1394 Bus host controllers device category does not exist, your Windows operating system does not provide FireWire support. It indicates that either a FireWire add-in card is not installed on the computer system, or the FireWire card is not detected. No further troubleshooting is necessary at this point.
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It is important that the computer system is unplugged from the power outlet when installing any add-in card on the motherboard to prevent electrical shock and possible damage to the computer system. For information on how to check / install the FireWire card, refer to the documentation that came with the FireWire card or your computer. As this problem may be related to the BIOS, Windows, or hardware we recommend that you contact your PC vendor, the manufacturer of the FireWire add-in card, and Microsoft for further support. |
Figure 2: The Host Controller is identified with a manufacturer and is OHCI Compliant:
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In the event of this, you could try updating the driver in Device Manager.
Right-click on the IEEE 1394 Host Controller and left-click on 'Update Driver'. Select the option to connect to Windows Update, and follow the Hardware Update Wizard to update the driver. Repeat this step for any unidentified IEEE 1394 Host Controllers.
If this fails, you could refresh the driver stack - please contact Microsoft for advice. For detailed information about your computer, contact your dealer. Microsoft Support: http://support.microsoft.com/. |
Device Manager uses the following symbols to provide information about a particular error condition with a specific system device:
Symbol | Definition |
---|---|
![]() |
Indicates the device is in a problem state. A device that is in a problem state can be functioning. A problem code explaining the problem is displayed for the device. |
![]() |
Indicates a disabled device. A disabled device is a device that is physically present in the computer and is consuming resources, but does not have a protected-mode driver loaded. |
![]() ![]() |
Indicates that Windows was unable to locate the drivers for the device or the driver is not available. If listed under ![]() |
![]() |
On a device resource in Computer properties, indicates that the Use Automatic Settings feature is not selected for the device and that the resource was manually selected. Note that it does not indicate a problem or a disabled device state. |
You could use the Troubleshooting Wizard, if available, to help you diagnose and fix the problem.
If, after troubleshooting, the IEEE 1394 Host Controller is listed and identified in Device Manager without an error symbol, it should be ready to use.
If you experience any of the following problems, you may need to investigate a possible IRQ conflict:
When the computer boots, a unique IRQ (interrupt request) is assigned to each hardware device that requires one. A device requires an IRQ if it can initiate an action or provide input to the computer. The FireWire card will be assigned an IRQ, as are devices such as your disc drives, mouse, and keyboard. The IRQ uniquely identifies that device as well as the software that controls it, and this is used by the computer. Some IRQs are reserved for specific device types, others are available for Windows to assign. Devices can share an IRQ in Windows without it causing a conflict generally as long as they are not used at the same time. If another device is sharing the same IRQ number, and both attempt to send information to the computer/are used at the same time, it will likely cause a conflict.
See the following Microsoft articles for IRQ support information:
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