I dont really remember. I went to the dell site that had all of the drivers and I pretty much installed them one by one from top to bottom on the list untill I had installed all recommended and some optional drives.

Did you first load Notebook System Software and the chipset drivers.

Inspiron E1505
Intel Core 2 Duo processor T7200 (4MB/2.00GHz/667MHz)
15.4 Inch UltraSharp TrueLife Wide-screen WSXGA+
4GB DDR2, 667MHz Crucial Memory
256MB ATI MOBILITY RADEON X1400
120GB 5400RPM SATA Hard Drive
8X DVD+/-RW Phillips Drive
Dell Wireless 1500 802.11N Mini Card
Dell Wireless 355 Bluetooth Module (2.0 + EDR)
Windows Vista Ultimate 64 bit
Bios A17
pur. Sept. 7 2006
WRT350N Linksys Router
Seagate FeeAgent 320GB External HD

Hey Howardsfamily.

since you're using WinXP on your E1405 laptop I think you need to install the KB888111 HD Audio XP hotfix first:

http://support.microsoft.com/kb/888111

then install the Sigmatel audio drivers from Dell's R171789 package.

are u using WinXP with SP2 or SP3?

btw - I also use the E1405 notebook computer but has pre-installed Vista

1. Here's the fix for no sound from laptop to TV via HDMI connection.  It's not a sound, video card problem AND THERE IS NO EFFECTIVE "PATCH" FOR THIS.  i'VE TRIED THEM ALL...  It's a VISTA problem FIXED BY DOING THE FOLLOWING;HOWEVER, YOU HAVE TO REVERSE THE PROCEDURE EACH TIME YOU WANT SOUND BACK TO YOUR LAPTOP SPEAKERS:
   1. Go to Windows Media Center
   2. Go to tasks
   3. Go to settings
   4. Go to general
   5. Go to Windows Media Center Setup
   6. Go to set up your speakers and click next
   7. Choose Toslink (digital) and click next
   8. Choose two speakers and click next
   VISTA is the problem -- not your drivers, etc.