Can someone take a look at this datasheet and tell me if I'm missing something?

That Disable signal has a bar over it, meaning that the disable is active when low.

If your monitor has pretty high input impedance, then the signal is jumping across the + to - input and going out the 402 ohm feedback resistor. Try putting something like a 1k load across the output.

Normal video signals are 75 ohm impedance, so the 75 ohm input load resistors, gain of 2 and 75 ohm series output resistors are typical, with the monitor having another 75 ohms to ground at the monitor end of the cable. But I suspect your monitor is a low bandwidth type without the terminating resistors.

Right,... that's why I'm grounding it to try to disable the amps and put them in a high impeadance state.

Jumping accross the + to - input? Never even crossed my mind. Is that possible? I'm totally a digital guy so my analog experience is very slim. I thought that the inputs to an op amp were supposed to have a virtually infinite resistance between them. (One of the only things I recall from my analog course) :-)

Nevertheless I'll give it a shot.... thanks!

There is a non zero capacitance across the two input pins. With a reasonable output load, this current path is small.

Ahhhhh.. gotcha. Good point. I just had a revalation BTW... I think what I'll do is ground the - inputs so the amp's gain is 2. Then I'll put a series resistor (as suggested) accross the output pins, bringing the output back down to proper elevels. That way, it will act as an amp with gain of 1 when active and when in high impeadance, the internal resistors will be in series to GND and should pull down the output for me. Does that sound like it would work?

That is its optimum configuration. Don't forget the terminating resistor between the + input and ground, to absorb the incoming signal, so it doesn't bounce back and forth between the source and the amplifier. That will cause thin ghosts at any high contrast vertical edge. The monitor should also terminate its signals the same way.

Good point. Thanks... I looked at the monitor datasheet and schematic and it states (and shows in the schematic) a 5.6k terminating resistor at the monitor. Seems high but what do I know....

A modern, high resolution monitor could not get away with that kind of terminator. This reminds me of the old black and white monitor (just a stripped down black and white television) on my Radio Shack TRS-80.

Yeah these monitors are really ooooooold school. :-)