Toshiba Satellite L450, backlight going out after a few seconds

Plecto · 03 Jul 2013

Hi. I've been having some trouble with my Toshiba Satellite L450. After starting the computer, the back light goes out after a few seconds. If I light up the screen with a lamp, I can still faintly see what's on it so the screen is still working. Closing the lid and opening it will make it light up for another few seconds. This happens regardless of software as the back light will go out even in the BIOS. I've tried to replace the inverter board with a new one (found one on ebay), but that made no difference. Since the screen is actually lighting up the back light has to be still working and since the inverter board wasn't the problem, I'm thinking that the screen is getting an order to shut off the backlight (as if the lid was closed). Does anyone have some tips?

TVeblen · 04 Jul 2013

You may need to replace the CCFL (fluorescent backlight) itself.
Process is similar to this: CCFL Backlight Installation|LCDPARTS.net

Alternately, you could buy a new display screen, which would have the backlight attached.

whs · 04 Jul 2013

The Toshiba setting for the backlight are in the BIOS. Try to make a permanent setting from there. That's how I did it on my Toshiba laptop. Unfortumately I do not have that laptop at this location so I cannot lookup the details.