Samsung DLP TV HL-R5067W green vertical bars on screen no picture

Change those capacitors that has a bulge at the top in the power supply stage

Check for open or leaky capacitors look for bulge on the top of caps

Sounds like a problem with the Vertical Video Card.

Have fun finding one. If your TV is still under warranty... send your TV off for repair.

If you get green vertical bars or green dots in the picture but not in the menu screen (Digital board symptom)

the digital pcbs on these sets go bad and need to be replaced when they start showing these symtoms

Check if it has a scrambled image on all sources ie - DVD- VCR - cable/satellite box. Since the PIP is normal it sounds like the signal source is bad.
Post back with more info about your set up (what's hooked to your TV) if you need more info

Sounds like the digital board needs replaced.

Replace the main pcb

it sounds like the dmd board is failiing

Your model has a maximum resolution of 720p. What you might want to do is make sure that both your cable/sat box and game stations are outputting at no more than 720 resolution. It's easy to assume that all HDTVs may accept a higher signal, and while they might, some of the scene changes or handshakes may make that operation cause the symptoms you describe.