Microsoft KB Archive/162803

= Sound Not Functioning on NEC Versa 4050 Notebook with Modem =

Article ID: 162803

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q162803



SYMPTOMS
The embedded ESS688 sound chip on NEC Versa 4050 notebook computer running Microsoft Windows NT 4.0 will not function properly when you use a PCMCIA (PC Card) modem. As soon as the modem is removed and the system restarted, the sound chip functions properly.

NOTE: The NEC versa 4050C is not currently supported for use with Microsoft Windows NT 4.0. Please refer to the Windows NT 4.0 Hardware Compatibilty List (HCL) included with your documentation for supported hardware.

An updated Hardware Compatibility List is available at the Microsoft Web site: http://www.microsoft.com.



CAUSE
If all other causes are eliminated, for example, IRQ or I/O conflicts, ESS driver not installed properly, sound not enabled in the system BIOS (see Other Troubleshooting Steps later in this article) there are three other settings in the NEC Versa system BIOS that you need to configure properly.



RESOLUTION
Turn on the NEC Versa, go into the system BIOS routine and make sure the following options have these settings:
 * Infrared Port: set to REAR
 * Serial Ports: set to ENABLED
 * Infrared/Serial Ports: set to RECONFIGUREABLE

Save these settings and exit the BIOS utility. Turn off the notebook, insert the PC Card modem, turn on the notebook, and start Microsoft Windows NT 4.0. If the modem and sound devices are configured properly (see Other Troubleshooting Steps to verify or change settings), the sound chip and the modem should now function properly.

Other Troubleshooting Steps:
 In the system BIOS, make sure that the sound chip is enabled. In Windows NT, make sure that the ESS688 driver is installed. If the driver is not installed, run the Multimedia tool in Control Panel. Click the Drivers tab, click Audio Devices, click Add, then select Unlisted or Updated Driver. Click OK, enter the path to the driver, click OK, and select ES688/ES1688/ES1788 AudioDrive 2.00.04 from the driver list. Click OK, supply non-conflicting I/O Address, IRQ, and a DMA Level (most often the defaults are acceptable - see step #7 for verifying available settings). For example, the system on which this article is based has audio settings of IRQ=7, IO=220, and DMA=1. The COM3 Port settings are IRQ=4 and IO=3E8. In the Devices tool in Control Panel, verify that the AUDDRV is set for Automatic and is started after the driver is installed and the system has been restarted. Verify that Audrive.sys is located in the %Systemroot%\System32\Drivers folder and has a file size of 62 KB, and is dated 5/13/96 or later.  In the Modems tool in Control Panel, verify the Modem settings. Look at the Attached To field and identify which COM port the modem is using. The following table indicates the default IRQ and I/O values used by specific COM port settings.

When possible use standard settings for COM ports:

<pre class="fixed_text">     SERIAL 1   COM1:  I/O Address = 3F8h   IRQ = 4 SERIAL 2  COM2:  I/O Address = 2F8h   IRQ = 3 SERIAL 3  COM3:  I/O Address = 3E8h,  IRQ = 4 SERIAL 4  COM4:  I/O Address = 2E8h,  IRQ = 3

Regardless of whether the modem is using the default settings (this can be confirmed in the Advanced Ports tools in Control indicated by the table, make sure the sound driver settings do not conflict. If they do, adjust the sound driver to use different settings.

If the modem is using the default settings specified in the preceding Table, you need to ensure that the modem and sound driver settings do not conflict. To check the modem default settings, use the Advanced Ports tool in Control Panel. </li> Verify which IRQs and I/O addresses are currently in use (with the modem installed) by running Microsoft Windows NT Diagnostics in the Administrative Tools group and clicking the Resources tab; check both IRQ and I/O ports.</li> If the sound driver resource settings conflict with devices other than a configured COM port (for example, Network adapter), identify available IRQ and I/O resources and modify either the sound driver or other adapter to use those available resources, eliminating any conflicts.</li> Make sure that the PC Card slots are enabled. Try the modem in the other slot.</li> Try a different, supported PC Card modem.</li> If this is a non-HCL system (not on the Microsoft Windows NT 4.0 Hardware Compatibility List), try a supported notebook or contact your hardware vendor.</li></ol>

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MORE INFORMATION
The NEC products included here are manufactured by NEC Corp., a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Keywords: kbprb KB162803

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