I GET WHITE SPOTS ON MY LCD SCREEN

If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

If it looks like this, then you're out of luck.. the LCD panel has to be replaced
LCD TV Panel Problem

re place lcd panel that is dead pixel

No,these problems are called a bruses or dead pictures pixels spots.These problems are only can causes by outer forces did some harm to the tv LCD screen panel itself.Sorry this problems can't be repair only can be replace like the whole LCD screen panel itself.Not pratical,save ur money buy a new tv.

It is the chip that controls the millions of mirrors inside the tv. If they are black, they are stuck closed. If they are white, they are stuck open. I JUST had the same the same thing happen with mine. I bought it 3yr and 2 months ago and I had an extended warranty on it for 3 years. Well, needless to say, it was out of warranty and I was pissed. The store I bought it from suggested I call Samsung. Which, I did. They asked for the model number and told me that my model (hlt5675sx) was one of the ones that is covered becasue they had a problem with the chip. Within 2 weeks, my tv was fixed by a repairman who came to my house. It works perfectly, now and it didn't cost me a penny. Good luck.

The white line is problem of the LCD's electronic. The spots are places where the liquid crystal is out of order of it's molecules, result of a shock and/or crack. Both problems cannot be fixed and the LCD screen have to be replaced. Take apart the lid and look the partnumber of the LCD on its back. Find replacement on ebay.

I hate to say it but what this is is contamination under the actual LCD glass. This propblem starts during the manufacturing process and can rear its ugly head over time or after running at high temperatures for long periods of time. It can also appear as dark 'tiger' stripes. There is nothing that can be done to repair this. If you have an extended warranty, the mfg should exchange the panel for you. If your warranty is up, take photos and contact Toshiba online and try to get them to cover this regardless. This is a mfg defect.

at some time the screen was hit, and has damaged a cluster . you wlll need a new lcd panel

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dark spot could be a faulty led. if you put a program on that is in white screen you should see all the leds light up the screen. dark spot will be were the led is not working. if on white screen and they all lite up but still dark around the area, it could be the lcd screen. and could be dying pixels. and try this video https://youtu.be/wlA2rcrAOCs