How can a ***** like dennythedon3003 help anyone?

Use windows update to automatically update your drivers.

I have the same problem, It works at an external display and the lcd and lcd cable work on another laptop.
The problem is that i have a sony vaio and it has no inverter, or at least i dont see one like an hp laptop for example. i tried to switch image from external monitor to lcd and it doesnt work. i tried everything. dont know what to do more, Hope you can help.
I have a Sony Vaio pcg-61813M.
Thanks.

To reset the BIOS follow my instructions from this link: http://www.fixya.com/support/r7229632-reset_or_remove_bios_password

may be not have installed all drivers and applications
You can find on this page :
http://esupport.sony.com/perl/swu-list.pl?mdl=PCGV505EX#div_pos_66

To adjust the brightness control, press Fn + F5 and release, plus the RIGHT ARROW or LEFT ARROW keys to increase or decrease the value.

On most notebook computers you can use the Fn+F5 keys to lower the screen brightness level, and the Fn+F6 keys to raise the screen brightness level.

go to the control panael and go to display and adjust apperance from there

PCG-K415B is the correct model number the label is possibly the service tage or something.

Here are the specifications of your laptop

• Intel Celeron D Processor 345 3.06GHz / 533MHz FSB
• 512MB DDR SDRAM - Low cost double memory Offer - call for details
• 40GB Hard Drive
• DVD Dual Layer Drive - To read DVDs and CDs and write CDs, DVD+, DVD- and large Dual Layer DVD
• 15.4" XGA Widescreen TFT Screen
• ATI Mobility Radeon 345M 64MB shared graphics
• Integrated wireless 802.11b/g LAN - Call for advice on Wireless networking
• Integrated 3-in-1 card reader –Memory Stick, Memory Stick Pro, Memory Stick Duo
• Operating System: Windows XP Home Edition
• Includes Sony Software Bundle

My guess is that the laptop is around 1 or 1and half year old as the celeron 3.06GHz is a relatively new processor.

Contact BatteryRefill support here:
http://www.batteryrefill.com/contact_us.phtml

They'll be able to help you better than anyone here on FixYa.

hi, the problem seems with the RAM, remove and clean the contacts with an rubber/easer, this should fix ur problem,let me know

Have you tried booting with a windows cd, and then running a disk check?