Clark said:
I'll look into it, thanks. This one is probably fixable but maybe not
worth the cost. I just hate to toss something that might still be useful.
Man, I know that one! It's hard for me to let go of something amazing that
still works, even though it's useless. That is the story for at least two
computers in my garage, and any number of parts and cables.
Here it is with CRT monitors: Three components commonly go bad: the power
supply, the phosphor coating on the inside front of the tube, and the data
cable.
If the picture is getting smaller or flickering in one corner or not holding
its shape, the colors are separating along one edge, and/or you hear a 16
KHz whistle from the back of the monitor, the power supply is failing.
Often they behave this way for a while, then just blink out like a blown
light bulb. The power supply is soldered to the motherboard, and there's
really no way to replace it.
If the picture is slowly getting dark and dim, the phosphors are spent.
This happens so slowly you get used to it until you put your monitor next to
a bright new one and go "wow." Repair would mean replacing the tube, which
is virtually impossible judging from the construction of the ones I've torn
apart, even if you could find a replacement tube.
If one of the three colors doesn't work, the color looks plain weird, and
the color that doesn't work sometimes blinks in and out, chances are you
have a broken wire in the data cable where it attaches to the computer. In
many monitors, the data cable is extremely easy to replace but the only way
to get a part is to salvage it from a monitor which has died of one of the
other two issues. Some really high-quality ones have externally replaceable
generic cables, and I think they all should.
All in all it's rarely practical to repair one of these things. Good ones
last a long time, but when they go, they go.
Obsolescence is another matter. I'm using several that other people have
retired just because they're small. One, a 1986-era 14" Sony, is really a
thing of beauty and will be missed when it fails. We use these on the
workbenches at Retread, when assembling salvaged systems and installing
software.