I bought a monitor arm for my monitor. But I suddenly found that there is no VESA hole on the back of my monitor!! Is there any solution for that? Or I might return it
Buy a vesa mount adapter kit. What the size of your monitor?
This guy mounted his non vesa monitor with an adapter: http://www.cnet.com/forums/discussions/how-do-i-mount-my-non-vesa-samsung-monitor/?ts=14576837320391
I would not recommend this for two reasons:
1) It ugly as hell... even a chinese crested looks great in comparison (and it's often considered the ugliest dog in the world)
2) You can cause severe damage to the monitor, either stress fractures/bending due to pressure on weak areas, or increased likelihood of fall damage.
Use at your own risk, but it's usually better just to get a proper monitor with mounting capabilities.