After 2 minutes, the picture on the screen disappears and lines fill the screen. And then when that's done the screen takes on this intense redish color. What is the problem? What should I repair?

Are you measuring LED voltage using frame ground or the plus and minus terminals at the connector

I would just replace the TV, the parts are not going to be made to repair this. The set is just to old.

Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
http://homenol.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

I wouldn't attempt as the capacitors on a tv store around 25000 volts this is more than enough to kill you and they keep there charge even when the tv is off. Either take it to a repair shop or put that money towards buying a new tv - Do not even attempt to open the tv. (It sounds like maybe a tube has gone or the electromagnet that makes the beam move vertically is gone.

Hi,
You need to adjust Screen voltage (decease a bit) to disappear white lines on TV. If you want to do it yourself, let me know to help you further.
Regards,

the redish hue usually mean that the camera doesn't have enough light to take a good quality pic. If daytime pictures taken outside still look the same take it back or get a new camera.

The matrix is dead. Probably because of an intensive light got into the lense while the camera was in night mode. It's dead. Nothing can be done.

I have a similar problem with our projector. It help to reverse the output for some reason. When reversed, all horizontal banding disappears.

I had a smililar problem after taking it apart i realised that i had screwed my mount skrews into the video main board and cracked it along with a few soldered wires, if you havent done any physical dammage to it try a firmware upgrade

It certainly sounds like the Red CRT (picture tube) has heater-cathode leakage and is not likely worth repairing, as all 3 tubes usually have to be replaced at the same time for best picture quality.