SAMSUNG SP-P4251 DISTORTED PICTURE AND THEN SCREEN GOES BLUE

Hi Michael.
check this out.
What causes vertical lines on TV screen? The two main causes for vertical lines on a Sony LCD television are input-related issues and problems with the physical screen. If vertical lines are appearing on your television's picture, you may be able to correct the problem and eke out a few more years from your unit.
goto this link.https://www.samsung.com/uk/support/tv-audio-video/how-do-i-run-a-picture-test-self-diagnosis-on-my-tv/
or this one.https://www.google.com/search?q=Samsung+LED+tv+has+distorted+lines+over+2%2F3s+of+the+screen&rlz=1C1OKWM_enGB877GB878&oq=Samsung+LED+tv+has+distorted+lines+over+2%2F3s+of+the+screen&aqs=chrome..69i57.650j0j8&sourceid=chrome&ie=UTF-8

what cables are you using to connect to the tv?

2/6 type

Most likely the 22Uf 450v Capacitor has went out. It's on the Main Power Board. It's a decent sized cap, but not a huge one. Take to a repair shop if u want, or take the back off, plug in your hair-dryer & heat up that cap. Should have picture within 10-20 seconds of it getting hot. If it solves your problem, just find / buy that cap & solder it on. (Or have someone who can) Total parts approx-$20 (Including Soldering gun/iron)

The capacitor is about $3.

Projection sets have two very common problems.

The first common problem is convergence


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

that is a connector error needs to be reseated but if it is new return it for an exchange

Here is the link where I viewed the specs on your tv. I do not see where you have the HDMI inputs.


http://www.bizrate.com/tv/samsung-sp-p4251-42-in-flat-panel-plasma-tv--pid70802962/

What component(s) are you connected to this TV?And what type of A/V cables are you using?
Does it only happen when you watch cable or directv or dishnetwork?
solutiondoct

Sometimes, need to check power bar with surge protected circuit.
If there was no problem with power bar, need to check power board.

Sounds like a tuner problem on the main board, you can take the back off and make sure that the tuners are plugged in good, alot of problems with tuners are the grounds get cold solder