TX2 - 1370 US VIDEO DISPLAY problem ....

hello friends i am new to this forum.. i brought a new HP TX 2 - 1370 US laptop from amazon site in USA and now using it in INDIA  since 10 months ... it came  with AMD processor and ATI raedon HD 4200 graphics . it came with 4 GB DDR 2 ram .
it worked fine for 11 months .. i started using the laptop for more time these days around 10 hrs a day or so . yesterday morning when   switched on the laptop  the screen is blank and only quick launch buttons are blinking and caps lock buton .. i connected the laptop to a working monitor but no response .
i took it to service centre in INDIA and they changed the RAM and exchanged the slots of RAMS but it didnt work ..and they said there is no warrenty for that models in INDIA ..
i finally went to 3rd party repair shop and they said its due to defective video chip .. it needs to be replaced and they are getting many laptops with similar  problems like this ... 
is there any way to fix that ? wat am i to do so that i dont ge t these type of problems again ?
i am also using cooling fan for laptop an i am working in AC room with room temp set to 25degrees ...
lease can anyone tell me wat to do  ?
shall i get it repaired by 3rd party as i cant send it to USA again .. are the video chips in this model really defective ?
thank you all ..........waiting for your responses....

Hello!
I just wanted to share my video display problem. Mine is a tx2-1375dx.  When is turned ON cold, it shows rubbish, like the sequence shown next. The problem persists using an external video display or projector.
Then, instead, I warm up the back of the display with a hair dryer, not too much, but that feel the heat has transfered inside, the Tx2 runs just fine. I also keep a fan cooling pad underneath instead of having the inner fan run 24x7.
So I guess the video chip has a thermal sensor that is being signaled when the display is warm and then runs fine. This would mean part of the functionality of the video chip may have been compromised by heat on the motherboard.
Too bad a promising machine was so poorly designed inside. It becomes too hot to put on your lap, so is no longer a "laptop".
So now, my other thing on my backpack to work is a hair dryer! 
Greetings from Central America!

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