Windows 7: Inspiron 9400 upgrade from XP Media to 7 Ultimate - now no sound!

Hi

I notice some similar threads but none that relate to my setup. I have a 4y old Inspiron 9400 laptop with XP Media edition installed when new. I recently bought Windows 7 Ultimate and upgraded - very easy and great improvement!!! I now have no sound. I have no idea what sound card etc I have in other than this info from Belarc -

Operating System System ModelWindows 7 Ultimate (build 7600)
Install Language: English (United States)
System Locale: English (United Kingdom) Dell Inc. MP061
System Service Tag:
Chassis Serial Number:
Enclosure Type: Portable
Processor a Main Circuit Board b1.85 gigahertz Intel Core Duo
64 kilobyte primary memory cache
2048 kilobyte secondary memory cache
Multi-core (2 total)
Not hyper-threaded Board: Dell Inc. 0YD479
Serial Number:
Bus Clock: 133 megahertz
BIOS: Dell Inc. A00 12/17/2005
Drives Memory Modules c,d93.42 Gigabytes Usable Hard Drive Capacity
80.69 Gigabytes Hard Drive Free Space

SONY DVD+-RW DW-Q58A ATA Device [Optical drive]

FUJITSU MHV2100BH [Hard drive] (98.52 GB) -- drive 0, s/n NW08T6427P2H, rev 00850028, SMART Status: Healthy 2048 Megabytes Usable Installed Memory

Slot 'DIMM_A' has 1024 MB (serial number E613F58D)
Slot 'DIMM_B' has 1024 MB (serial number E613F58A) Local Drive Volumes c: (NTFS on drive 0)93.42 GB80.69 GB free Network Drives None discoveredUsers (mouse over user name for details) Printerslocal user accountslast logon Inspiron05/01/2011 15:17:05(admin)local system accounts Administrator14/07/2009 05:53:58(admin) Guestnever
Marks a disabled account; Marks a locked account Microsoft Shared Fax Driveron SHRFAX:Microsoft XPS Document Writeron XPSPort:Controllers DisplayATA Channel 0 [Controller]
ATA Channel 1 [Controller]
Intel(R) 82801GBM/GHM (ICH7-M Family) Serial ATA Storage Controller - 27C4
Ricoh xD-Picture Card Controller ATI Mobility Radeon X1400 [Display adapter]
Generic PnP Monitor (17.2"vis, January 2005)Bus Adapters MultimediaIntel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27C8
Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27C9
Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27CA
Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27CB
Intel(R) 82801G (ICH7 Family) USB2 Enhanced Host Controller - 27CC High Definition Audio DeviceVirus Protection [Back to Top] new Group PoliciesAVG Anti-Virus Free Edition 2011 None discoveredCommunications Other DevicesConexant HDA D110 MDC V.92 Modem

Broadcom 440x 10/100 Integrated ControllerAPIPA Address: Dhcp Server: none responded Physical Address: Intel(R) PRO/Wireless 3945ABG Network Connection primary Auto IP Address: Gateway: Dhcp Server: Physical Address: Microsoft ISATAP AdapterTeredo Tunneling Pseudo-InterfaceNetworking Dns Server: Ricoh 1394 OHCI Compliant Host Controller
Microsoft AC Adapter
Microsoft ACPI-Compliant Control Method Battery
Microsoft Composite Battery
Standard PS/2 Keyboard
PS/2 Compatible Mouse
SDA Standard Compliant SD Host Controller
Generic USB Hub
USB Root Hub (5x)
Generic volume shadow copy

Can anyone help?

Its probably a driver. Since your system is so old there are only vista driver.. They can be used if installed in compatibility mode. To do that right cleick the installer>properties>compatibility>choose vista.

Go to dell with your express service tag here . Drivers & Downloads

download the correct driver (32bit or 64bit) and install.


Ken J