Toshiba Q35 Laptop Display

Usually means Faulty GPU.

To test you will need to connect an external monitor via the VGA port. If the same thing happens then its your graphics card. If it looks normal than it is your LCD panel.

There are other things that could possibly be wrong i.e: cable box assembly (cable that connect between mainboard and lcd)

But 99.9% this sort of problem is either LCD/Mainboard/VGA Board Therefore will be an incredibly expensive component to replace. You may want to think about purchasing a new laptop depending on the cost or repair and the fact that toshiba only supply 90-days warranty on spare parts.

I have connected an external device and the same problem exists.  I have dismanteled the unit and the video card is integrated.  The history of this unit was a replaced LCD from physical damage about a year ago.  Otherwise the unit is origonal.

If the issue shows up on an external display as well it is generally the video which as you said is onboard.

In rare cases it can be bad ram as well if the computer uses shared graphics memory(with system memory).

Can't you post the full model number off the bottom of the notebook? I can see if it is a known issue with the notebook. I need the q35- something number and the other one marked model number off the serial number sticker.

The Q35 is a discrete card. i am an ex employee of toshiba and am familiar with the model.

unfortunately the Motherboard is not worth replacing it is time to purchase a new laptop i would also recommend purchasing the manufacturer's extended warranty.

KAVO

Qosmio G35-AV650

PQG31U-016007

BTW:  Ram Swap did not help.

I called the 800 number and a box has been shipped.  We were ready to scrap this expensive laptop. THANKS!