These are steps for everyone who will have such problems.
At ordinary day, the laptop or notebook begins to show defects on the screen or without any image on it while the bios and operating system loads.
First of all, try to connect another display using VGA or HDMI port to verify if the screen on laptop working well. If you have a clear image on the second screen (display) then you have problems with cable or the screen.
Second step is to blow with vacuum cleaner every hole in it to be sure nothing was getting inside it and to clean from the dust. If image coming back then I will advice to give laptop for the cleaning (it means to open and clean, but don't try to do it for youself).
If nothing helps then the chip responsable for image (video-chip) has burnt.
My question: Is there any possibility to return laptop and to get some money back or to change to the new one with lower price if only video-chip is burnt?
But I will prefer to repair it, cause it is a good one, but I don't think there are components for this model (TouchSmart tx2z).