TV works fine for about 5 mins then the picture turns into vertical colored lines moving erratically. Sometimes the picture will come back and it will work fine for hours. Main problem is vertical lines on TV with no recognizable picture.
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This seems to be a problem with some older panels. If you are prepared to tackle the problem yourself then try the following.
WARNING there are some very high voltages within the TV which can be LETHAL so the greatest of care should be taken.
With the back of the TV removed, use a hair dryer and apply warm air to all the ribbon cables in turn until you find the one which causes the fault to disappear. Now turn your attention to the faulty ribbon and remake the connections as necessary.
I have never heard of a warm-up problem on a digital television. Unlike the old CRT TVs and monitors, digital panels don't have to warm up. I would go with the TV repair persons assessment that you've got a bad panel.
There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc. http://en.wikipedia.org/wiki/Capacitor_plague Please post back what you find.
This television, appears to have had a failure in the mainboard. This
is the board that controls the video functions and sound functions. The
unit should be taken or sent in to a service center for testing and
servicing. The service center will have all the correct service
information to determine the problem for you. You can call Insignia
customer support at this telephone number 1-877-467-4289. You can also
got to the customer support website at www.insignia-products.com. Go to
the support section and ask them for help on how to get service for
your television. I hope this information helps you with your problem.
the vertical blue lines indicate some interference from other electronic gadgets near your tv. it started showing up on my sony grand wega when i installed my wireless modem. i almost ordered a new rear projection lamp costing over $100 but decided to experiment. i first moved my desk computer farther away from the tv then isolated the wireless modem router by placing it inside a small glass - the vertical blue lines became lighter in color so i dedided to find another small glass that fit inside the first glass container then put the router in the double glass - no more blue lines and my wireless modem router still works.
do some deductive thinking to figure out what's messing up your tv and isolate the interference.