backlight not working

[drGabriel]

Hello, I have a, HP G62, and I have a problem with my screen. I had done an update of my bios, from version F.08A to F.48. Once that I had done it, when it restarted my screed was not working. I started to look on internet on my phone reasons and I found many reasons for a screen to done't work, so I choose a few things: I replaced the screen with a new one and nothing. Searching more on net, I saw how to check if my motherboard is broke, so I put a flashlight on my screen and I could see that was working, I connected the laptop to a monitor and is working, just that my backlight from screen is not working. Also I replaced the cable from screen. When I checked on device manager is showing me that Intel turbo Boost Tehnology Driver is not working. Then I installed an older version of bios, F.35, than in bios everything was ok, just the screen still not working. I also instaled the old verion of bios F.08A, and still the same screen without backlight.

   Please I need help as I really need the laptop.

   Thank you!

[Sparkles1]

Hi drGabriel, 

Welcome to the HP Forums!

I would like to take a moment and thank you for using the forum, it is a great place to find answers. For you to have the best experience in the HP forum, I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.

I grasp that after updating your bios your screen did not work.  If you connect an external monito,r it works.

You tried reinstalling different bioses and have finally reverted back to the original.

Here is a link to Troubleshooting Black Screen Displays with No Error Messages During Startup or Boot.

You can run the HP Support Assistant   to aid with HP updates and resolving issues.

If you would like further assistance please provide your exact model of HP G62 notebook you have and the Operating System you are running.

How Do I Find My Model Number or Product Number?

[drGabriel]

Hello Sparkles1,

  Thank you for your replay. I had tried to do all the tests from that link with the memory and memory slots, both memories are working and also the memories slots too. But still the backlight not working only on external monitor.

   Also my HP G62 model number is XC209EA#B1T and my opertating system is Windows 7 Professional 64-bit Service Pack 1.

   And I just checked again and Intel(R) Turbo Boost Technology Driver is still nnot working. I reistalled the driver from HP site but still not working. This is happening just with last version of Bios.

   Thank you, and I hope we can resolve this problem!

[Sparkles1]

Hi drGabriel,

Thank you for your reply.

I suggest you go into the bios setup and restore the defaults.  F9 key (once you have entered the bios).  If you still do not have a backlight on the display, you have proven it is the display backlight that is not working. 

Here is a link to the HP G62 Notebook PC Maintenance and Service Guide.  Please note page 18 item 1 for a list of part numbers to replace the display, if you choose to replace it.

[drGabriel]

Hello,

   As I aiready said in my first message, I had replaced the screen already, and also the cable from screen and webcam. With both screens is the same. 

   Also I had restored the defaults in Bios, and nothing.

[Sparkles1]

Hi drGarbriel,

Thank you for your reply. 

I suggest you do a recovery back to factory.   Performing an HP System Recovery (Windows 7).

You will receive an option to backup your personal files to prevent data loss.  If you have not done one recently, I suggest you do one now.

Restoring Files that were Backed Up Using HP Recovery Manager (Windows 7)

You could also contact HP support for assistance. They can remotely access you system to help locate and resolve issues.

Please call HP technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region HP Technical Support Sitemap.

[drGabriel]

Hi,

 Thanks for your replay. I live in UK, but on that site I can't find the UK number. Can you give me the UK number, please?

     Thank you!

[Sparkles1]

Hi drGarbriel.

Heres is a link to the page with the contact page for the UK.  UK contact information page.

Have a great day!