Not sure, it is possible, but I guess you are aiming at the high voltages generated by the flyback transformer. The thing is, of course yes, these voltages are up to 25.000 Volts. However, there is not a lot of real power behind it. Currents are very low.
Luckely, I've never experienced it, but my uncle has repaired TV's for a very long time of his life and occasionaly had (about 2 times) the "pleasure" of touching some wrong part and enjoying that kind of voltage. My uncle is still alive and kicking at almost 60 now.
I've felt the voltage of the backlighting of an Atari Lynx (which is about 1500V) and I tell you, it bites, but that's it... touching both the Live and the 0 wire at once with one thumb at 230V was a hell of a lot less nice experience, I've had two black "contact points" on my thumbs for weeks after that !!!
If you would touch a voltage like that that really has a lot of power behind it (power rails, stuff like that) you're definitly very dead. I've heared a story about two guys working on rails like that and something went wrong. One they never found anything of him back, the other was apparantly able to still take a couple of steps before collapsing. Those steps were marked by small pools of water......what happens is that you became one big blister, all the water is getting out of your body at once.....not a nice thing to think about....
Anyway, electrical stuff is always a combination of both voltage AND current.
There are parts within a TV that carry a (much) lower voltage, but have lots more power (net power f.i. !!) behind it, and those CAN be lethal !
A human body can actualy withstand surprising little current (or is it surprising ?):
AC 1A DC 1A heart stop
AC 75mA DC300mA irreversable heartfibrilation
AC 30mA DC 120mA breathing paralysis
AC 10mA DC40mA Muscle cramps
AC 0.5mA DC2mA gestation
Anyway, better always be safe than sorry....