Having problems with your HP Pavilion dv4000 Notebook ?

My cd drive has diapeared

\015 It was under my computer now nothing shows up for the CD drive\015

Answers :

\015\012Log into your system and Open Device Manager.
\015\012If you dont know how to open Device Manger then :----
\015\012Right Click --> My Computer and select Properties. System Properties window appears.....
\015\012From System Properties window select the Hardware tab.
\015\012Click --> Device Manager Button
\015\012A list of devices appear on the device manager window...
\015\012Look out for Dvd/CD-Rom Drives in the list. If there's a red cross on the drive then, right Click it and select enable.
\015\012and refresh the list.
\015\012Normally reboot is not necessary but if does not come then take a rebbot.
\015\012If this does not solve your problem then go for this :----
\015\012Start Registry Editor (Start, Run and type in regedit then click O.K)

Locate the UpperFilters value under the following key in the registry:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetContro lClass{4D36E965-E325-11CE-BFC1-08002BE10318}

On the Edit menu, click Delete, and then click OK.

Locate the LowerFilters value under the same key in the registry:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetContro lClass{4D36E965-E325-11CE-BFC1-08002BE10318}

On the Edit menu, click Delete, and then click OK.

Quit Registry Editor.

NOTE: After you remove the Upperfilters value and the Lowerfilters value, if you notice lost functionality in a particular program, such as CD recording software, you may need to reinstall that software.

Restart your computer.
First, if the CD drive uses an expansion bay on the laptop, remove it (with the power off) and reinsert it to make sure it is seated correctly. Power on the system, enter the BIOS setup program and check to see if it has been recognized again. If it is not being recognized here, the drive is defective and needs to be replaced. If the drive appears in BIOS, allow the computer to boot and check to see that the drive is appearing under My Computer. If not, open the Device Manager, click on the View menu and make sure that Show hidden devices is checked. Open the CD/DVD-ROM Drives section. You should see an entry for your disc drive and it may be dimmed. Right-clicking and selecting Properties from the context menu will probably indicate that the device is not currently connected to the computer (Code 45). If so, right-click on the computer name and select Scan for hardware changes in the context menu. If this does not detect and initialize the drive properly, the device is probably defective and needs replacement.
Repair Help & Product Troubleshooting for HP Pavilion dv4000 Notebook

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