HP DV9335nr get a black screen is another issues of it user was experience. The lights are displaying but there is nothing on the screen. He’s already contact the HP support about the problem, and the technician said that it is a most motherboard problem that needs to be replaces. This issue occurs shortly after HP resolved the screen latch on a previous recall then.

If you have similar problem of getting a black screen on HP DV9335nr laptop, the one method you can try to resolve the problem is try a hard reset. In case you don’t know about doing hard reset, here are the simple following:

First off, you need to remove the power cord and battery from your HP DV9335nr. Hit the power button in about 20-30 seconds. Now you can reinstall battery and power cord correctly. If it was then power it on. In many cases, hard reset is a good way to fixed the problem.

After using HP pavilion dv9074CL for a few times, this day one get a trouble with it Quickplay and volume control buttons. All of blue lights are on except the volume and mute buttons. Normally the sound heard chirpings, but now is nothing. Actually, while running Windows XP on dv9074CL he’s able to use quickplay going through the start menu and the volume also works when he play a DVD but not on touch pad.

If your HP pavilion dv9074CL has similar problem in it Quickplay and volume control buttons, you can try this solution to resolve it:

Take out the battery and ac power. After powering down the laptop, then put them back in. This will reset the quickplay buttons on
dv9074CL, and make it run as default. In case the method of unplug and battery reset didn’t work, you need to make sure USB port and all ports is works well.

HP dv9000 optical drive that was dropped the transfer mode to PIO is possibly make the drive is not working. General symptoms of this problem are the driver won’t recognize blank CD-R or music CD put on. And also, usually when the user put software disc into, green light will flash, but then stops with nothing happened.

If your HP dv9000 optical drive not working you can try this following to fix it:

- Go to Device Manager, if there is on the DVD/CD-ROM drive you can see a yellow triangle with an exclamation point in it, that’s shown where the problem is.
- Then right click IDE ATA/ATAPI controllers and choose Properties.
- If one of those channels shows a current transfer mode of PIO you can try right clicking the drive and click Uninstall.
- Go to the top of the list in Device Manager
- Right click and select Scan for Hardware changes or the similar word and the system will reinstall the channel with UDMA 2 transfer mode.

After restarting HP dv9000 to make sure the system manage well, now you should see the driver is work properly.