Re: 42" RCA LCD TV with vertical green line
Hi brokensyn
The monitor is missing the horizontal signal. The horizontal signal is what gives the screen it's raster ( full screen on). If turning the set off and on doesn't resolve the problem, then the issue is within the set itself. The set has to be opened up to test the internal components and surrounding circuits. if you are tech savvy and have knowledge of electronics, by using a schematic you can attempt to repair the faulty circuit by using a DVOM and soldering equipment. Today's large screens with multiple input/output jacks have allot of bugs in them which are not resolved easily, and judging from the picture you posted the t.v will not be re-set by just pushing buttons on the remote. What you can attempt to do is disconnect your x-box and other devices and set it as a plain screen t.v to see if those devices are creating the problem. If the issue persists, then you will have no alternative but to bring it to a certified technician.
post back your findings.