Yes, when not discharged a CRT can hold up to 27,000 volts. However, there's also an even bigger risk of the CRT neck (which is VERY fragile!) being cracked or broken if handled incorrectly, which basically means broken glass everywhere, and bye bye CRT. Not to mention, if when reinstalling the analog board, you connect the anode cap (the big suction cap that goes on the back of the CRT) incorrectly, it could short.