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Large black square appears on screen of my Insignia NS-15LCD TV.

The black square covers most of the screen and comes and goes for no apparent reason. Sometimes, it includes a message-like text within the square.

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  • 121 Answers

Look for the closed captioning (CC) menu in the set up and turn CC off.

Posted on Feb 25, 2009

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Led power light comes on but screen will not come on.


"Blinks a few times" implies the TV is flashing a fault code at you. If you can find a service manual for your model, count the number of blinks and look it up in the diagnostics section.

However, the most likely problem is a burned-out electrolytic capacitor in the power supply. These are usually easy to identify visually; the top of the can-shaped capacitor should be flat, but may be bulged out and may have brown or black material leaking from the vent scores. The photo below shows a bad capacitor to the right of a good one; both have black plastic sleeves.

If this is the case, replacement capacitors are relatively cheap. However, you should look for the following criteria in choosing a new part:
>Capacitance (uF): same as the original, or 10% higher if the original value is not available
>Voltage: same or higher
>Temperature: Maximum temperature should be same or higher
>Physical size: should fit in the space occupied by the original; if buying a taller unit, make sure it will fit when the back cover is reinstalled, and make sure the capacitor will not touch heat generating parts such as heat sinks, resistors or large transistors.
>Ripple current: get the highest available without compromising too much on endurance. Ripple current may be specified in mA or A; 1 A = 1000 mA. Sometimes you can get a better rating by going to a higher voltage part, but physical size may be a limitation.
>Endurance: Try to get 8000 hours or better.

I usually use Panasonic FR1 series capacitors, although United Chemi-Con EKZN capacitors are also worth a look. 25351068-tkog3zu3xmxabptjkcidpctj-1-0.jpeg

Jan 02, 2015 | Insignia Solutions Original INSIGNIA TV...

1 Answer

Screen size and resolution keeps changing while I work.


some tv devices are set by default to auto adjusting, look in tv's setup and adjust the resolution manually.

Feb 23, 2013 | Toshiba Computers & Internet

1 Answer

Does an insignia ns 15lcd have an internal voltage regulator?


All sets have one in some form or another to compensate for changes (WITHIN REASON) in line voltage coming into the set.

May 24, 2012 | Televison & Video

1 Answer

I have a ns-15lcd and it won't turn on. I tried putting it a different outlet and nothing. When you put the ac adapter plug into the tv the red light comes on and then goes out. Any suggestions? Thanks,...


usuallly it is the adaptor that is bad yes with a load the adaptor will
produce the correct voltage but there is a capacitor that has gone south try to find a universal supply at Bestbuy with the same voltage and current output

Sep 24, 2009 | Insignia Televison & Video

1 Answer

Insignia tv will not powerup


Nothing at all? Does the screen seem to go from dark black to a lighter shade of black?

If the screen appears to stay on the darker shade of black then it is broken, and needs to be sent for repair. ( ie the screen isnt powering on when the tv is and there is nothing you can do without opening it.

You might try unplugging all cables and leaving it off with no power for a day This is in effect performing a factory reset.

and this may sound stupid and patronizing but is the TV being taken out of standby mode and actually switched on?

Nick

Sep 09, 2009 | Insignia NS-LCD47HD-09 47 in. LCD TV

1 Answer

Television is working but the screen


most likely the power supply has gone bad. in lcd tv's there are lights behind the screen that illuminate the picture so you can see it. if the power supply doesn't supply the voltage to light these up you won't be able to see it. try mcmelectronics.com for parts. if the power supply doesn't fix this problem your lcd panel will need to be replaced.......too expensive as it costs more than the tv did when you bought it. good luck

Jan 13, 2009 | Insignia IS-LCDTV32 32 in. Television

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