Samsung HLR5688w - has green ghosting on the pictures any idea what this may be?

Two things to look at first:

Remove and inspect lamp to see if damaged or if picture is dim.

Second is listen for a fan like or high pitched sound or even a grinding sound---color wheel...

Those are the two most common issues here.

You need to try this monitor with another PC first to verify if it is the monitor problem or the video card problem.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

It sounds like the color wheel has failed and needs to be replaced. You can call 1-800-samsung to find the nearest service center.

If its a whinning noise then you need to replace the Color Wheel.Go to this website for Part Number
Encompass Parts Disturbtion

Check the color wheel.

Possibly a bad light tunnel assembly if the part is only a shadow effect. If not then probably a bad DMD board. The DMD board is part of the light engine but needs to be replaced by a technician.

That humming sound is a sign that your color wheel is becoming or already is defective. If you don't replace it you might even lose picture in the future since it's part of the light engine system

22.17 for bulb with housing and my mom took tv to tv repair store and they charged 25 dollars.

these tv are night mares best case get rid of the projection tv period go with a lcd flat pannel and make sure it dsnt have a lamp

sounds like you need a service call if it's in warranty, if not in warranty, you may need to have the logic main board replaced