Monitor Repair: Should I repair my own display?

I have three monitors. One will not power on, another is out of focus, and the last flashes blue. Can I open the monitor and turn some screws or replace a part?

I know how to use a soldering iron. As an avid computer user I have worked on my own computer equipment to install RAM and cards.

Apple does not recommend you attempt to repair a display yourself unless you are an Apple Authorized Service Provider or a technician trained in display or monitor repair. A display has dangerously high voltage even when the display is off and unplugged.

Voltages inside a display can reach up to 30 000 V and can pose a serious shock and safety hazard when the display's case is open. Apple recommends you have a local Apple Authorized Service Provider service your display.