Having problems with your Dell Inspiron 9400 Notebook ?

Dell inspiron 9400 dvd/cd rom not recongized. tried fix it from MS help. didnt work. not listed in device manager dell wasnt much help either.used to work fine. Not my machine, so i dont know all that has happened. Vista home prem. 32 bit. please help.


Answers :

I'm a Help Desk Support/PC Tech (and the ONLY one for my company) so I live and breathe all kinds of issues...it's my bread & butter. I recently had a co-worker bring a laptop to me for the same reason...not to say that you're having the same problem but with what information you did provide, it does sound quite the same. The DVD wasn't listed in Device Manager nor My Computer and it wouldn't play any discs. The operating system installed on his laptop was Windows XP but the fix is the same for both XP and Vista.

I finally came to the conclusion that the cause of this problem was due to corrupt registry entries, possibly left by CD burning software. He had installed iTunes for his iPhone and the previous user had also installed a CD burning program. And, there's no telling what else had been done to the system. Sometimes removing an installed CD burning program can cause these corrupt registry entries to interfere with the functionality of your DVD/CD drive. If this is the problem, the fix is as simple as making as checking the registry to see if the entries are there and making as much as a couple of changes in the registry and viola! It works again.

ALWAYS CREATE A FULL BACKUP WHEN MAKING ANY CHANGES TO YOUR SYSTEM. When modifying the registry, you can also create a backup of the registry only and restore it from the backup if any issues occur.

Try this for Vista:

1. Click Start then click All Programs
2. Click Accessories then click Run
3. Type regedit into the text box then click OK
4. In the navigation pane,on the left, locate HKEY_LOCAL_MACHINE then click the folder to open it and find the SYSTEM folder. Click the SYSTEM folder then go to the folder named CurrentControlSet and click it. Drill down to the folder named Class then click it. Within the Class folder, you will see several folders named with a series of alphanumeric characters enclosed in {} brackets. Find the one labeled {4D36E965-E325-11CE-BFC1-08002BE10318} and click it.
5. If I'm correct about your problem, in the right pane of the window, you will see UpperFilters (if not, your issue is caused by something else and you can exit the registry). If you do see UpperFilters listed in the right pane then click it.
You may see an UpperFilters.bak registry entry. You do not have to remove it. Click UpperFilters only. If you do not see UpperFilters but do see LowerFilters, you still may have to remove that entry for this fix to be successful.
6. On the Edit menu, click Delete. You can also right-click UpperFilters then click Delete. Confirm the deletion.
7. Now for the LowerFilters, in the right pane, click LowerFilters (again if you DO NOT see this entry nor did you find the UpperFilters entry in the registry, you will need to move onto troubleshoot further).
8. On the Edit menu, click Delete. You can also right-click LowerFilters and click Delete. Confirm the deletion.
9. Now you're finished. Exit the Registry Editor and restart the computer.

After you restart your computer, the first thing that you should do is open My Computer to see if the drive is now listed. If you did find the Upper and LowerFilter entries in your registry and removed them, your drive should appear now.

I am assuming that your drive is still operable and is installed correctly. When I fixed this same issue on my co-workers laptop, the DVD ROM was recognized and working after the reboot. Also, because these registry issues are one of the most likely causes, it doesn't hurt to go into the registry just to see if those entries are there. If they are present, this is most likely the cause and the only solution that I know of.

Try these steps if you haven't already and post the results...
Repair Help & Product Troubleshooting for Dell Inspiron 9400 Notebook

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