Avoid the cable going to the CRT to the power board. Also avoid the big black box on the power board. I would discharge it.

Heres a nifty idea. Get a old power cord and cut off the two main prongs and tape them off. Leave the ground 3rd prong on. Plug it into a outlet for 10 seconds. Just prey your outlet has a common ground so it will discharge. If the outlet doesn't have a common ground then it will not discharge.
To live is to let die