BE VERY CAREFUL!!!
There is enough current inside a monitor (either on or after it
has just been shut off) to kill you if you're not careful!
With the cover off, you'll notice a large wire going to the top
portion of the tube, be very careful around this wire, especially
if the monitor is on!
With the monitor off, check the way the monitor sits, you may
have to brace the rear of the tube as the case would normally
do that.
Best to do this before you turn it on to minimize the arching and
sparking!
Working with the convergence rings can be pretty tough as the
rings don't need to be moved much to make the slightest adjustment
Move only one at a time and return it to it's original spot until you
find the ring that adjusts the red.
I can't stress it enough to be very careful... there is more power in
a monitor than just getting bit from the wall outlet!
As my electronics teacher told me, "Electronics is a wonderful thing,
but if you find yourself across the room and you don't know how you
got there, you know you did something wrong!".
On the other hand don't let me scare you away from attempting this
repair yourself, just respect the monitor and it will respect you!
Scott