There are 5 Lagrange points in the sun-earth orbital dynamics. L2 has the earth between the telescope and the sun. L2 is semi-stable (in 2 dimensions) and a minimum of fuel will be needed for positional adjustments, but it is too far for any repair missions, even if we still had shuttles.
Only L4 and L5 are stable in three dimensions.
Well, OK!
First time I’ve noticed your name.
You will get the ping on EVERY Lagrange point question from now on.