Pavilion dv6700 no audio output device, no DVD/ROM Vista 32bit

Question

 I actually have 2 of these computers, but the first overheated 5 years ago, and when I pulled the power cord the female part of the adapter came out of the cord jack with the power cord adapter. Neither of the batteries on these 2 computers were part of the recall.  HP Pavilion dv6700 notebook entertainment pcX-86 based Product number FE654UA#ABAmodel # dv6915ntservice ID 18240 Windows Vista Home Premium 6.0.6002 Service Pack 2 Build 6002AMD Turion 64 X2 Mobile Technology TL-60Vista Service pack 2,  32 bit BIOS Version/Date Hewlett-Packard F.34, 3/22/2011
SMBIOS Version 2.4
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "6.0.6002.18005" [Sound Device]Item Value
Name Conexant High Definition SmartAudio 221
Manufacturer Conexant
Status OK
PNP Device ID HDAUDIO\FUNC_01&VEN_14F1&DEV_5051&SUBSYS_103C30CF&REV_1000\4&887B936&0&0001
Driver c:\windows\system32\drivers\chdrt32.sys (4.36.7.0, 184.00 KB (188,416 bytes), 3/4/2008 1:32 AM) Ricoh R5C83x?84x Flash Media Controller Driver Ver 3.51.01Viewpoint Media playerAdobe Flash 11.9.900.170 Active X and Plugin Adobe Shockwave Player 10.2.0.023Adobe Shockwave Player 12.0   12.0.2.122 Cyberlink DVD Suite  5.5.0928 Chrome Frame 32.0.1700.76 Sorry to provide yet another audio device post, but my working dv 6700 did not come up on search HP support. I get the message "No audio output device is installed." after an update.My DVD drive has disappeared. The fan never shuts off and is LOUD unless I use power saver mode, where it doesn't run at all. The system restore says it has no backups, but it does have some recent backups. The pavilion runs very hot.  To remedy the sound issue I have tried:updating BIOS,repairing the operating system with sfc/scannow,system restore,Microsoft Fix It automatic repairs,  and other lesser ideas such as:updates,reinstall driver,Services properties for audio Some of the fixes work temporarily, but inevitably the sound is lost again, and the icon in the system tray has a red x.  The hardware cannot be found in device manager, so drivers cannot be updated.I can't turn the hardware on or off, because it isn't found in the first place.Rebooting sometimes fixes it temporarily. It's very frustrating to have an entertainment pc with no sound. Can you please help? Links to repair options at HP under Problem Reports and Solutions do not always work. When they do, the problem recurs.  I have not even attempted to get back the CD ROM or fan issue. Thanks for your patience, and for being there to help.  -C

Answer 1

Error Msg - "No Audio Output Device is installed" - Mine is dv6000 series.... tried everything on this forum... fixes provided by Hp / MS did not work; sound, video and game controllers did not appear in the device manager; Recovery of driver from Recovery Manager did not work; system restore did not work. .... See how i did it.....Did a complete system Recovery to factory condition using Recovery partition... sound returned... worked for a few days... then disappeared again... so it was clear that it was not a hardware related issue but the reason was some update provided by microsoft (sp1, sp2, silverlight, internet explorer or one from those 100 updates that i got from ms after the system recovery (you can never say for sure which update neither can u pinpoint it to sp2)... its actually a conflict .... what i observed was that internet explorer update continued to fall in despite it already being installed.... so went and uninstalled it (not much of an issue just about 9 to 10 MB as compared to a fat MB of SP2). ... and there it was = sound returned !!! so did the internet explorer update which i hid from then on .  Prob solved....  The webcam which had also returned after the system recovery remained with me from thereon and was not affected by the win updates this time.  Now the only issue before me is the CD DVD Drive... which also appeared after a long period of silence (something like after many years) ie after the system recovery, but disappeared soon after the updates... so again not a hardware issue but a windows update issue... here too fixes being provided do not work... search continues for the DVD Drive restoration.