Seems like my monitor expands

[Anaconda]

Whenever I make adjustments on my Samsung 900NF, and it comes out of when the monitor is shut off from idleness or restarting my computer, either my monitor adjustments shrink or enlarge. How can I keep it the same?

 

[cvlegion]

It does this on all larger monitors. It takes a while for the electron gun to heat up so that it can have the maximum deflection to the far reaches of your monitor. After a minute it should be normal.

 

[NaughtyusMaximus]

I believe the 900NF manual states that you shouldn't make any adjustments to the screen till it's been on for 15 minutes.

 

[gsaldivar]

I agree - this is a heat related issue. It happens with all larger monitors, and there is no way to really "fix" it - it's just something you have to learn to work around.

Wait until the tube warms up to its normal operating temperature - usually about 15 minutes or so, before making any adjustments. Then learn to live with the first 15 minutes of inaccuracy while the tube is warming up each time

Some higher end Sony monitors (and others?) have onboard hardware compensation for the warmup period, but on the midrange and low end tubes, you just have to work around it.