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lcd backlight power inverter short

post #1 of 6
Thread Starter 
I have a toshiba satelite, and I believe there is a short somewhere in the wire to the power inverter of the backlight CFL. slight pressure sometimes returns power to the screen. is there anything I can do besides replacing those wires? and should I replace them, is it important to have exactly the same type of wire for proper voltage/current?

Thanks for any help
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post #2 of 6
What this actually sounds like is just a loose cable from the motherboard to the LCD itself. If you can, open up the casing and look at the flat 40 (probably) pin cable at the rear of the monitor. Make sure it is pushed all the way in and be sure to put some tape on top of it afterwards to make sure it stays in.

How old is the notebook?
 
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post #3 of 6
Thread Starter 
well, I never lose the image, just the light projecting it. I know that both the power inverter and the backlight cfl are in working order.

its a 2006 btw
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post #4 of 6
Aye aye aye, same thing that happened to my recently killed A135-S2276, I think it may relate more to a transistor or a weak circuit connection on the inverter, which is generally located somewhere around the bottom bezel of your screen (inside the lid itself, you will need to remove the outer covers).

Also, does it occur when the screen is jolted or bumped in some manner?
And since you say its from 2006, is it the model/similar model to what I had?
Edited by raidmaxGuy - 10/11/11 at 1:43pm
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post #5 of 6
Thread Starter 
I recently purchased a new inverter, thinking the previous one to be broken. but it turns out both work with the same problem, which is making me think its the wire.

if I can find a multi-meter, im thinking I can just hit the the incoming power pin on the connector and the ground on the inverter to see if I am still getting current when the screen is off.

and I have an M105-S3004.
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post #6 of 6
Quote:
Originally Posted by ryanggfx;15267655 
I recently purchased a new inverter, thinking the previous one to be broken. but it turns out both work with the same problem, which is making me think its the wire.

if I can find a multi-meter, im thinking I can just hit the the incoming power pin on the connector and the ground on the inverter to see if I am still getting current when the screen is off.

and I have an M105-S3004.

It uses the exact same chassis (case, lid, port layout, etc.) as my A135 did, Btw, even though LG made the screen, I still think they did a poor job with their TFT&WXGA mobile LCD panels, to me they seem quite fragile, simply dropping my laptop caused the screen to shatter in about 50 places. So just saying, it could be a connection issue with the CCFL backlights on the inside of the screen itself. Put the multimeter on the connector where the pink and white wires connect to it(teston the inverter, not the wires, and do whatever causes the backlight to die) (they are usually this color and should be for the CCFL power)

If no changes are noticable, then the screen has internal issues.
Edited by raidmaxGuy - 10/11/11 at 7:12pm
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