The last monitor I sent to the bone yard had this once or twice a week habit of shrinking the width about 1/4 inch and then returning to normal within a second or less.
At first I thought it had something to do with the cheap beer I was drinking.
Took me a few weeks of watching it to figure out what was happening.
Tried reseating the cable/vid card...no help
Thought about spending 100 bucks to fix a 150 buck monitor....nope
A friend gave me a 19-in. monitor. A Radius L-1, an older monitor. Works great except for 1 thing. He mentioned it doing something periodically (he couldn't explain exactly what). The image seems to shrink and resize, near as I can tell. Happens so fast it is hard to really tell. That's why I describe it as blinking. Might just be refreshing itself. Don't hear any electrical crackle indicating arcing. Anyone run into this before. Google shows it to be made by KDS using the FCC number (evokd-1910t). Doesn't seem to be doing any harm (been doing it a long time), I just don't like unexplained things. chuck