Question about Insignia IS 20" TV040919 TV

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Insignia NS-F27C 27" Flat Tube TV

The input keeps switching back and forth on this tv by itself and we can't get it to stop. If you hold down any button, either on the tv or the remote it will stop switching, but as soon as you let the button go, it starts to switch back and for again... what is going on?

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  • Anonymous Nov 21, 2007

    I am having an identical problem. The input keeps switching on its own.

  • getitfixed Nov 26, 2007

    I am having close to the same problem ..

    If i press any button on the remote it just switches to the next input.

    I cant access my cable channels, or any channels for that matter. It doesnt matter what button i press on the remote, it will just move to the next input option.

    I tried the buttons on the TV itself, they are inactive, except for the power button of course.

  • popnyah Nov 30, 2007

    Yeah, whats going on!!!! same thing happened to me. Whats up with this crappy Insignia TV's . front buttons are innactive and just switchs by itself.
    :(

  • fahadriz8 Dec 24, 2007

    Im having the same problem.

  • lfcedmonton Dec 25, 2007

    same problem - thought it was my 2 year old.  Very pleased I logged on. Hoping for a solution ASAP.

  • Anonymous Jan 13, 2008

    Mine is doing the same thing

  • Anonymous Mar 04, 2008

    no power

  • oleksa May 01, 2008

    I'm having the same problem.

  • bill47 May 05, 2008

    I've got the same problem with my NS-F27C. It has now migrated to the stage where the front panel keys (menu, ch+/-, etc) are not functioning, and the tuner i/p is skipped when changing the i/p on the remote. Also, no video or sound on any i/p, just the blue screen and text. Before I pay for a service manual, has anyone who has had this fixed (under warranty?) know whether the fix involed replacing any components, or was it a micro/memory re-programming exercise thru the remote/service codes?



    Thanks.

  • GUSS033 Dec 27, 2008

    ANY ONE SOLVE THIS PROBLEM YET, ANY IDEA, THANKS

  • Anonymous Jan 04, 2009

    on my insignia ns-f27c 27 inch tv the input keeps coming on when we press a button on the remote even when we dont it stil keeps going to input and the tv buttons dont work wats going on?

  • Anonymous Apr 11, 2009

    the explanations are very confusing...

  • mad_caroler May 11, 2010

    If anyone has a service manual or knows the steps to getting one.. please let me know

  • brokeandfix May 11, 2010

    I am having the same problem... but this is not a solution! Anybody have any luck with this one?

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I repaired it!
My Insignia TV set started showing the same problem reported here, after a static discharge sparked when my wife was cleaning the TV with a cloth.
The information provided by bill47 proved to be very useful. I tried to find the data sheet of the large 64 pin IC, TDA973, I found the TDA 9351, which may be from the same family. I measured the voltage at pin 6 and it was approx. 0.2V. I imagined that if I forced that voltage to a higher value the IC would believe that no button is deppressed and so return to normality. From bill47 comments and my measurements of resistance to ground with the TVset off I estimated that a voltage divider was formed with a 3.3K resistor from +3.3V to pin 6 and 180 ohm to pin 6 to ground. In those conditions, I calculated that if I add a 18 ohm resistor from 3.3V to pin 6 I should force the voltage at that pin to 3V. I first tried with a 120 ohm resistor between pin 61 (peripherial power supply in) (+3.3V) and pin 6. This moved the voltage to 1.7V, the failure persisted, but the effect was different, as if another button, located at the rigth of the Input button, was permanently depressed. This showed me that I was in the right trak. I refined my calculations and replaced the 120 ohm resistor to 15 ohm. That raised the voltage at pin 6 to 2.5 V, and solved the problem. The front panel buttons were disabled (except for the Power button), but that is not a problem, I never use them, I always use the remote control. So I can continue enjoying my Insignia TV set! Thank you bill47 and all the other people who posted their comments.

Posted on Mar 30, 2009

  • Joe Astro Sep 25, 2010

    Great Post i have the same problem, BUT i don't understand if you jump 15 ohms resistor directly from pin 61 to pin 6 or add to 3.3k in series or parallel?
    Would appreciate any help.. really really helpful post....thanks

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Purchased the service manual, and traced problem to the "KEY" input (pin 6) of the Philips universal TV processor chip (TDA9373 - the large 64 pin DIP on the main PCB). This single pin connects to all the front buttons/momentary switches making it extremely vulnerable to ESD strikes. Each of these switches is configured in a "resistor ladder" voltage divider circuit, which produces a unique voltage at pin 6 for each of the 7 switches. When no key is pressed the voltage on this pin should be around 3.3V (via 3.3K pullup to the 3.3V supply). My defective unit measures only 0.17 volts -- suggesting ESD damage. This condition confuses the processor (thinks a key is constantly being pressed) which explains the behaviour of constantly changing inputs, etc. In my case the front panel power button still operates because it shorts the input to ground (zero volts) which is still properly detected. Unfortunately the only remedy is to replace the part, which is likely fairly expensive. Because there is a microprossesor core in this device, it may have to be purchased directly from Insignia/Haier to ensure it is programmed correctly for the particular TV model. (Have not yet checked price/availability.)

Sorry for the bad news!

Posted on May 08, 2008

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What is ESD? is that that I have to change?
any idea where can I buy it?
I was looking for Insignia/Haier but I didn't find something

thanks

Posted on Jul 07, 2008

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So should i be assuming that it worked ?

Posted on Jan 23, 2008

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Just sat on hold with tech support for over a half hour, someone finally came on and said this:

Unplug your TV, and disconnect everything you have attached to your tv (antennas, cable wire, input cables from VCR/DVD/cable box, EVERYTHING) and let it sit for about a half-hour to allow the tv to return to its factory settings. Then, plug it back in and see if it works.

It has not been the full half hour yet, but if I don't repost here, then assume that this solution works!

Posted on Jan 23, 2008

  • brokeandfix Jan 24, 2008

    Well, the above solution was a no-go for me.

    Called tech-support back and they informed me that I have to get in touch with the in-home service they offer and have a repair person come to my house and fix the tv. This is a free service since my TV is still under its 1 Year Warranty.

    so much for the easy fix-it-yourself answer, I guess!

    **If you are Canadian and purchased the TV from a FutureShop, you need to take the TV directly into the store and have their technicians deal with it. The in-home service that Insignia put me in contact with was at a BestBuy store, and they said that if they were to send someone to look at it, I would be charged initially and I would then have to submit the charges to the manufacturer to be reimbursed. It is easier to take the TV into the store and deal with the technicians there.**

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Any one find any tricks that make it work?

Posted on Dec 25, 2007

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