Help DVD-ROM and DVD-RW not found after installation of..

[Zero523]

Well hello guys, im in need of help here..
Well i purchased 2 items... a Nvidia 6800GT, the 6800gt didnt run with my 250w PSU.. but anyhow the card was defected anyways..i had artifacts during the BIOS..
So i purchased a Sparkle 550w PSU , (I heard Dell computers come with Sparkle PSUs) , i installed the PSU everything seemed fine.. i tried the Nvidia 6800 GT card again, same problem.. its defected going to RMA... but then i noticed i was missing my DVD-ROM and DVD-RW rom were missing in the 'My Computer' section... This has happened before when i installed my 9800 PRO.. but i did a system restore and it came back,.,.
But i did a system restore again... and now its not comming back...
Also when i start my computer up, during Bios my computer says 'Hardrive not found' press F1 to Continue or F2 to Setup.. i press F1 and my windows starts up normally.. but with out my DVD-rom and DVD-RW drive.. what can i do? please Help.. Thanks in advance
I am using a Dell 8300 3.2 GHZ HT 1024 Mb ram

 

[Zero523]

Anyone.. please help.. at least an idea of what the problem could be?

 

[Auric]

If the drives came pre-installed from Dell and no changes have been made in the CMOS setup then I would check with Dell support. Perhaps it is a known issue they have a solution for. If you installed one yourself then confirm their master/slave jumper settings and cable positions (master should be at end and I suggest the writer should be master) -presumably they are both on IDE2. If that checks out okay then poke around the CMOS setup and refer to the manual to confirm correct settings. If during boot there is no longer an issue but there is in Windows then you could try removing the drives from Device Manager and refreshing to reinstall or even removing the IDE storage controller. In any case confirm the correct specific Intel controller is identified and drivers installed rather than generic standard and finally that DMA is enabled for each channel.

 

[Ichinisan]

Make sure none of the IDE ribbon cables are loose.