If the LCD is cracked and bleeding, then no it is not worth repairing. If it does not power on or has what is called "the 2-second to black" problem, then they are more than worth fixing. All they need is a couple of after market capacitors since most electronic companies use crappy ones which blow very easily. I have already fixed two monitors which only cost me $5 in caps. One monitor was free and the other cost me $25 to have shipped, but they are both 1600x900 widescreen displays which are both still on the market for $140 new.
I wouldn't touch a CRT since I nearly killed myself with one a few years back. CRT stands for cathode Ray tube. TO emit the lasers which activate each pixel, they use a massive tesla coil and so they other required components can contain massive amounts of electricity even powered off...
I can't really offer a tutorial on anything other than removing a cap and soldering a new one. It is very simple if you already have some skills in soldering. The most difficult part of the process is opening the shell without braking tabs off. THen again, all you need there is patience.