I have a Mitsubishi LT-40134 (40 in HDTV) which is about 3 years old. There are a series of colored lines that take up about 6 inches of the right hand part of the screen. I called Geek Squad and they said that would not be able to fix it if they came out. Any idea what is wrong with it? Is it just a POS?

SOURCE: Geek Squad Backup Disks

Usually you just put the first backup disk in the CD/DVD drive and restart/reboot the computer.
If it does'nt boot up you have to go in to the bios settings and change the boot sequence so that it boots from the CD/DVD rom instead of the Hard Drive. When it's finished the restore task you can either leave the bios settings as they are, or change it back to boot from the Hard Drive. Sometimes the backup/restore disks will put the PC back to the same as the day you bought it, which means completely wiping the Hard Drive and reloading the Operating System (Windows) and any programs that where installed at the time the disks were made. If you can run the backup/recovery from within Windows there will be a program in the Programs list on the Start menu. That way you usually keep anything that you have added since you bought the PC and it just reinstalls the Operating System to restore it back to it's original condition.

Hope this helps.

SOURCE: Vertical lines on my 40 inch lcd mitsubishi hdtv 1080.

I assume your Misubishi is not close to anything electrical. However, it sounds like you have had an interference for some time. This will ineviteably cause the HDTV LCD to collapse. LCD's don't respond well close to heat. Is there a vent close? LCD's do well in a properly vented area but with all this said.......they will pick up interference from anything electrical. A few questions to ask ones self........are there any wireless devices or chargers close to the LCD? Might there be an oven, a/c unit or other wiring with 220 volts anywhere close to the LCD such as in the wall?
The Mitsubishi LT is a very reliable, multi component ready set that allows great viewing with surround sound. However, stop and think about this interference. It is not something in the unit. It is an interference. Look hard and when you've discovered it.....you won't believe how crystal clear this set will be.
Let me know what you find...Thanks for using Fixya and add any comments that may help us help you.

SOURCE: spot on the screen

This problem is covered by Mitsubishi even out of warranty.

SOURCE: Mitsubishi WD-52525 52-inch DLP HDTV ywllow warning lamp light

that means your lamp it is getting to the end of its life.
sometimes even if the lamp still good the TV will send you that message because that timer is closed to 5000 hours

What you can do is open the lamp door, closed again and the tv will ask you if you replaced it the lamp, and just say yes and that sign will go away

or just simple replace the lamp. 915P020010

SOURCE: vertical lines on my 40 inch lcd mitsubishi hdtv 1080

Bad/Going Bad/Will go horribly bad TCON board (small circuit board sitting at the top of the panel in the back).

Most likely, the whole panel will need to be replaced in order to rectify the issue.