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I have an insignsa ns-lcd42hd-09 (I have 2 of thies) It will come on,the screen will light and no sound. A blue box says wait, then it goes black. I have swaped out the main tv board and p/s board from the other tv that would at least stay on and pull up the menue.Whats next?

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  • rknight2 May 14, 2010

    Just noticed that only the lower half of the screen lights dimmly then shuts gowes black Ihave a second set it had bulb problems. So I replaced the first sets p/s and main board same problem. I'm looking at the lamp inverters next. what do you think?

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Hello Rknight2, hi, as you have describe, the LCD lower half is dimmed, this is an LCD failure, you need to swap the LCD with the other, and see if the trouble is solve. does the two LCD TV you have are both defective? its hard to test if both TV are defective, you must first sort out which is defective and which are good. but you need to put all the good parts on the TV with a good LCD screen. as for the inverter, test it first, swap a good one, get one on ebay if both inverted are bad. DID you test if the P/S and main board are good? make sure they are good and put them on the TV with the good LCD screen, get one from ebay if both boards are bad.

Posted on May 15, 2010

  • 1 more comment 
  • rknight2 May 15, 2010

    Thanks you are the first not to insult my 40 yrs of exp. Lets call the set I'm not trying to fix "set 2" and the one I'm fixing "set 1" . set 2 had broken back light tubes so I swapped out the inverters from set 2 to set 1the one I'm repairing . All lamps light now but only for a second. I checked the voltage on the p/s board and to the other boards , all ok. the tvs were used in a factory as computer monitors. that were they went bad. sense the boards from set 2 are in set 1 I would think set 1 would behave as it was set 2. you sound knolagable, please stay wiht me on this.



    p.s. the power light is red on standby and blue on run and the fiber optic port is lit. when turned off the red light blinks 7 times?

    Thanks



    RKnight2

  • rknight2 May 15, 2010


    May 15, 2010 - Thanks you are the first not to insult my 40 yrs of exp. Lets call the set I'm not trying to fix "set 2" and the one I'm fixing "set 1" . set 2 had broken back light tubes so I swapped out the inverters from set 2 to set 1the one I'm repairing . All lamps light now but only for a second. I checked the voltage on the p/s board and to the other boards , all ok. the tvs were used in a factory as computer monitors. that were they went bad. sense the boards from set 2 are in set 1 I would think set 1 would behave as it was set 2. you sound knolagable, please stay wiht me on this.

    p.s. the power light is red on standby and blue on run and the fiber optic port is lit. when turned off the red light blinks 7 times?
    Thanks

    RKnight2

  • Jerry Umali May 17, 2010

    Hello Rknight, hi, the 7 blinks you describe is still a power supply failure. the TV is on standby mode, this occurs when power required by the TV is not enough, there is a need for you to check the main board for shorts, both set1 and set2, now to do this, you may need to swap out both set1 & 2 to or for a good main board.

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