Black shadow on left side of led flat screen tv when turned on. Goes away in 30 to 45 minutes. Why? 5 to 6 yrs old.

SOURCE: After turning on tv screen stays up for 1 minute

Hi there, first off, place a fan as close to the back of the tv as you can, this could prolong the use of your tv by cooling down the powerboard inside, The reason why your tv is doing this is becouse the caps (capacitors) in the powerboard are going out. This is a very common problem in all class and price ranges of modern lcd and plasma tv's/ monitor's. I don't know if this problem has been like this for awhile or it just started, but either way, if the tv takes an abnormal amount of time to "warm" up then it most likely will go out all the way sometime in the (near) future. If you have a tiny bit of will and knowledge ypou can open the unit and get to the print board. Examine this for "popped" capacitors, they will have a buldging top instead of a flat one. Im gonna try to include a pic of them here, if i can get it this time, I've tried bfore lol. But you can google image a "popped" or "bad" capacitor and you would be able, with ease, to diagnose if you have any of these. Usually only one or two. Radioshack sells capacitors (couple anyway) for $1.59 each. MAKE SURE the replacement is of the SAME voltage or HIGHER, or you will be right back replacing those 2. Every capacitor has a negative pole marked with an (-) on the side of the capacitor(by one of the "legs", always puit the negative (-) "leg" of the new capacitor in the same hole in the printboard as where the previous negative (-) "leg" of the capacitor was ( a capacitor with the negative and positive "legs" put in backwards will result in the new piece "popping" as sson as you turn it on!!) make sure the "uf" rating (for example the most common popped capacitor is the 1000 uf) is the same as the one you are replacing. I needed 1000 uf, 105 c and 26v (volt) ratings for the 1 capacitor I needed to replace to fix my LG 19" lcd panel monitor I found by the trash that the light came on off, but it didn't come on. I replaced that capacitor with ; 1000uf, 85 c and 36 v (volts0...It works fine eventhough the volts and the temperature rating (36v and 85c) was not the same as the (26v(volt) and 105c ) capacitor I removed !! Further, I've replaced capacitors that had the celcius rating of 105 with the only ones Radioshack had, namely 85 c(celsius) they have been working great, but I'm not sure about any effect, nor have I heard or read (yet?) about that making an urgent difference. Many threads that I've read people have done the same, so we should be ok (my stuff has been running good for a while longer then most brand new ones!.............(all these ratings ; 'uf ' and 'c' etc are on the side of the capacitor you are replacing and on the side of the ones you are replacing them with)...For all this all you need is the cheapest solder gun u can find (I bought one for $7.99 at Radioshack), a camera (to take pictures as you go to remember how to reassemble the unit) and, once you have your materials, 20 minutes to replace 2 or 3 capacitors and you are good to go...Most monitors and tvs (lcd/plasma) I've seen you have to lay flat on the ground/bed/blanket etc, to work on (screen side down). Usually there are 2 or 3 screws (or a few more) to remove, then you will have to carefully (its comes off easily most times)insert a flat screwdriver inbetween the casing and gently pry it up as you go around the whole frame. Sometimes you have to remove the little washer arouind the cable input orso, just be gentle and you cant go wrong. Once insidet here will be a box with wires running to the sides etc...unplug, gently, these wires and open the box. Inside you will find 2 or 3 circuitboards, check them all for "popped" capacitors, replace, reassemble and plug it in....Have fun becoming an overnight tv mechanic lol! If this helped you (or not) then please rate, thankl you!

SOURCE: Black screen after 5 minutes of use with Fujitsu PDS-420 plasma

most of the time, when the power light stay green, thr filter capacitors in the power supply have lost value, & need replacing.
When the power light turns red it indicates loss of signal. This could be the same problem except the input signal has been lost. Try replacing power supp;y caps , about 4 of them.
Works 90% of the time. Hobby of mine, Art

SOURCE: Losing signal intermittently every 1-5 minutes

This problem is probably due to weak signal strength from the cable to the television. Buy a signal amplifier for you cable line in and use another cable out of the amplifier output to your Television input signal source, This should bring up the signal strength for you.You could also have your cable company check the input signal strength to you house or apartment and see if the cable itself needs repairing or replacing.If this does not help with your problem , then you need to have your television tuners signal input circuit tested it may have weakened from age. This may be adjustable in the tuner box, but this is something for a service technician to determine. customer service number for Insignia is 1-877467-4289. Hope this helps you with your problem

SOURCE: 3 horizontal lines across screen and triple shadow on left side

its a LCD connectors. re-connect it properly. some loose connection.

SOURCE: Picture problem

Hi,
raystratton

I was wondering if you were able to solve this issue. i am having the same exact issue with my tv. and i did not get an extended warranty thinking that nothing would go wrong with a sony tv. i learny my lesson the hard way. Can you please tell me what the tech told you or what you did to fix this problem. All your help will be greatly appreciated. Thanks once again!!!