I just purchased a HP w2338h monitor. After only 2 days of partial use, I have 4 stripes running vertically on the left side of the monitor screen. The colors are 2 green, 2 red and the spacing between the stripes are different but approximately 1/4 inch to 1 inch apart

Is the picture still visible? If it is yes you just need to factory reset the monitor. If not, check your inverter.

reset the projector,if it doesnt help,its probly got to do with ur dlp colour wheel.

That is asign of failing LCD panel (the LCD controller (T-CON)) board is goin out, it will get worst with more lines. Not much you can do. You can try reseating the ribbon cable between the panal and the Logic board. You can look here to see what the LCD controller board looks like.
http://s807.photobucket.com/home/budm/allalbums
http://www.badcaps.net
http://en.wikipedia.org/wiki/Capacitor_plague

It could just need the print heads cleaning or aligning
If you are not sure contact the shop you purchased your printer from it is under warrenty for 12 months

They are vertical lines running from top to the bottom, then it can be loose ribbon cable or dirty connectors, or failed LCD controller board (part of the LCD panel assembly, whole panel will have to be replaced).
See pictures: http://s807.photobucket.com/albums/yy352/budm/LCD%20panel/

if are waranty try there

Yeah, I have this exact same problem, except my mom slammed my laptop shut in frustration around half an hour ago, so that's why it's like this. The right half of my screen is black with two colorful stripes (mostly white), but the left half is visible. I've researched a bit and found out that this is because the LCD in your monitor has burnt out, and since you don't have a monitor to attach, the only thing you can do is to go to where you bought the laptop and either get it fixed for free or return it for a brand new one (if your warranty still stands). If not, you might as well get a new laptop. I think my warranty has expired, so I'll get a new laptop, hopefully.

Hope this helps!

~Sam.

You screen "LCD" is broken , need new lcd panel. Very expensive

We originally had a red stripe roughly 3" wide running vertically on the ride edge area of our Panasonic 52" Viera plasma tv. It has now been joined by a solid black stripe of the same width running from the top to the bottom. Living in Germany and purchased at local PX long enough ago that the warranty is likely expired. Now what?

Hi Detrix, Check with www.lcdrepair.net if you want a repair. Something is wrong with your LCD controller and or GUI interface circuit or the circuit supplying power to it. If your technically endowed, you may want to open the monitor case and clean the dust and lint from around the circuits using a Small paint brush to sweep away any built up dust. These circuits take the Signal from the computer and controls the 2.5 million pixels on the LCD screen. Dsut can cause major problems with handling all that data. Give it a shot, what do you have to loose, its not dangerous if the monitor is unplugged.