Hp 420i unusual problem

i have a brand new HP 420i. it is installed as master on ide2. recognized in bios, will boot from cd prior to loading windows.

once winxp boots up, it recognizes the drive as a “HP DVD 420n” and finds new hardware for a cd-rom drive.

however when i put a cd or dvd in the drive, it will not read them. trying windows explorer comes back with a not responding window.

it is listed properly in device manager with UDMA mode 2.

i dont understand how it can work during post but not in windows?

any ideas?

BTW i have tried 2 separate 420i with same problem. a lg cdrw was on this channel working fine prior to this.

Atlon XP 2600
nforce 2 MB
1 gig pc3200
Ati 9800 pro

I know you probably checked this, but are the jumpers on the drive set to master? Usually the factory ships them as cable select. I’m not an expert on the drives, so I can only offer what I know.

Also, check your IDE drivers. I heard Nvidia drivers have issues, and the windows IDE drivers are more stable.

done and done. thanks for the quick tips though…

anyone else?

i emailed HP and this is what they sent back… they want me to disable DMA and then try deleting UpperFilter and LowerFilter registry keys (what are they?)

anyways dont like the idea of disabling DMA…

email follows;
Thank you for contacting HP Total Care.

I see that the HP DVD Writer DVD420i is recognized as DVD420n and the
drive locks up while trying to use the drive to read CDs or DVDs.

The inquiry string “dvd420n” is the inquiry string which is assigned by
the manufacturer and is not to be confused for the model DVD420i.

Regarding the Explorer not responding and the drive not reading any
disks, these issues are usually related to the system trying to use the
memory access (DMA) method to communicate with the drive.

Use the steps below to disable DMA. In some cases it may also be
necessary to disable DMA on the CD-ROM drive to resolve the issue.

  1. Click Start, and then Control Panel.
  2. Double-click the System icon. The System Properties window will
  3. Click the Hardware tab, and then click the Device Manager button.
  4. Double-click IDE ATA/ATAPI Controller.
  5. Double-click the controller the DVD Writer is attached to
    (normally the Secondary IDE Channel).
  6. Click the Advanced Settings tab, and then click PIO Only in the
    Transfer Mode box.
  7. Click OK.
  8. Close the Computer Management window and then reboot the computer.
  9. After restarting go back into the Device Manager and verify that
    the DMA mode is disabled.

If the DMA mode remains enabled after rebooting, it might be necessary
to configure the HP DVD Writer as the master device on the secondary

  1. Connect the HP DVD Writer drive to the Secondary IDE controller
    using the cable that is included with the drive, and set it to
  2. If using another CD-ROM drive, set it to slave.
  3. Be sure the drives are jumpered properly.
  4. Go into the system BIOS and Advanced settings.
  5. Try changing the IDE configuration.
  6. Change the Secondary master definition from Auto to CD-ROM. This
    should allow defining the mode.
  7. Change the mode from Fast PIO mode 3 with bus mastering to Fast
    PIO mode 3 without bus mastering.
  8. Save the settings and restart the computer. DMA should now be
    disabled for the HP DVD Writer.

If the problem persists, you can resolve the problem by backing up the
registry and then deleting UpperFilter and
LowerFilter registry keys, and by replacing the existing device

=== Backing Up Registry and Registry Key ===

 CAUTION:  The registry contains critical information and a 
           registry backup is essential.  An incorrect registry 
           entry may cause serious system problems or prevent the 
           computer from starting.  You will not be warned of any 
           incorrect registry entries.  If the registry is not 
           backed up, the only way to recover the system is to 
           reinstall the operating system.  Do not double-click the 
           Backup.reg file on the desktop unless you intend to undo 
           the changes you are making to the registry. 
  1. Click Start and select Run.
  2. Type Regedit in the Open field and click OK.
  3. Click “File” in the menu.
  4. Click “Export” from the drop-down menu.
  5. Click the down arrow beside “Save In” and select Local Disk(C:).
  6. Type Backup.reg in the File Name field.
  7. Click Save.

=== Deleting UpperFilter and LowerFilter Registry Keys ===

  1. Click Start and click Run.

  2. In the Open box, type regedit and click OK.

  3. Click the plus (+) sign beside HKEY_LOCAL_MACHINE.

  4. Click the plus (+) sign beside System.

  5. Click the plus (+) sign beside Current Control Set.

  6. Click the plus (+) sign beside Control.

  7. Click the plus (+) sign beside Class.

  8. Locate the {4d36e965-e325-11ce-bfc1-08002be10318} key and click it.

  9. On the File menu, click Export.

  10. In the File name box, type savedkey and click Save. It is better
    to save the “savedkey” to the desktop.

  11. Click the REG_MULTI_SZ data type UpperFilters (found in right
    window pane) and then click Delete on the Edit menu.

  12. When you are prompted to confirm the deletion, click Yes.

    NOTE:  If this data type is missing, continue to the next 
  13. Click the REG_MULTI_SZ data type LowerFilters (found in right
    window pane) and click Delete on the Edit menu.

  14. When you are prompted to confirm the deletion, click Yes.

  15. Quit the Registry Editor and restart the computer.

=== Replace Existing Driver ===

  1. Click Start and click Control Panel.
  2. If Control Panel is in Category view, click Performance and
    Maintenance and click System. If Control Panel is in Classic view,
    double-click System.
  3. On the Hardware tab, click Device Manager.
  4. Double-click DVD\CDROM devices and Click the drive next to it.
  5. On the Action menu, click Uninstall.
  6. When you are prompted to confirm the removal, click OK.
  7. Repeat steps 4 and 5 for all other drives.
  8. On the Action menu, click Scan for hardware changes.

This should resolve the problem and you should be able to use the drive
without any problem.

If you have further questions, please reply to this message and we will
be happy to help you.

You may receive an e-mail survey regarding your e-mail support
experience. We would appreciate your feedback.

Please visit our Owner Services Web site for details on keeping your HP
and Compaq products up and running.



HP Total Care

Our advice is strictly limited to the question(s) asked and is based on
the information provided to us. HP does not assume any responsibility
or liability for the advice given and shall not be liable for any
direct, indirect, special, incidental or consequential damages in
connection with the use of this information. Always back up your data.
For more information, including technical information updates, please
visit our Web site at http://www.hp.com/go/support.

Maybe just need a reboot

still having no end of trouble…

update: i re-installed windows and using generic IDE drivers and still same issues. the funny thibg is that the drive will read cds (albeit very slowly) during post or in winxp safe mode.

also when i put in a blank dvd-r it detects this but wont burn (power calibration error)

what in the heck can i do here?

Try replacing the IDE cable with a good quality 80pin DMA100 rated cable :wink: Cables have been known to cause issues.

PS I would NOT disable DMA transfer mode if i were you :slight_smile: