INSIGNIA NS-L47Q09-10A: No Sound, No Picture

[magicjeep]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

That black fuse is the common failure, I have fixed so many of these CMO boards and they are just bad fuse, I used PICO II fuse (you have to bend the legs to install it) and none of the repairs come back.
You can jump it for testing (or use 1~4.7 Ohm 1/4W resistor), the circuit draws <0.5A.

Would this be a replacement for the fuse?
http://www.radioshack.com/4-7k-ohm-1...l#.VTgOEv7F_dp

If not could you direct me to the correct place. Thanks

[budm]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

That is 4700 Ohms not 4.7 Ohms.

http://www.radioshack.com/74-mf1a-b-...2Bfuse&start=4

http://www.digikey.com/product-detai...2313-ND/700718

[magicjeep]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Duh, I didn't see the k after the 4.7. So 1 of those would replace the flat square black fuse? I apologize for my newb questions but I really don't want to buy another tv and I want my kids game systems back in the basement. lol. Again thank you very much

[budm]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

"So 1 of those would replace the flat square black fuse?" yes, no need to remove the old fuse either, just have good soldering skill and good iron and flux.

[magicjeep]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Thanks for the help. I'm going to run over to radio shack tomorrow, if it's still open, and see if I can pick them up. Also you're not kidding about good soldering skills those things are tiny in a tinier space.


And another duh, it's online only. I really should learn how to read.

[newtothis]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Thanks for the help. I'm going to run over to radio shack tomorrow, if it's still open, and see if I can pick them up. Also you're not kidding about good soldering skills those things are tiny in a tinier space.

Flux is key

[magicjeep]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

What would the small white fuses be?

http://www.newark.com/littelfuse/045...E?gross_price=

[budm]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Did you check the white fuses with TV plugged in? should not be plugged in.
Also sometime there are flux built-up on the solder ends of the SMD component so you may have to clean the flux off first to get good readings.
If the white fuses are blown then you have bigger problem, please verify for sure that the white fuses are good.

[magicjeep]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Ok here's an update. First thank you guys for the help so far. I purchased a new board and installed it today. Now when I press the power button I get a flash of "PLEAS WAIT" on the screen. After the please wait, the screen goes black and I get nothing. No sound no picture, nothing. I had 2 devices, a wiiU & directv box, plugged into the HDMI ports. I tried changing the input using the side buttons and still nothing. What should be my next step?

[newtothis]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Do you have sound?

[magicjeep]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Nope. I tried turning the volume up with the buttons and I got nothing. I also tried shining a light in the screen and I couldn't see anything. The only thing with the sound is I'm not sure if the devices that were plugged in were making noise. I'm going to find a dvd player and throw it on the tv.

[shumiron]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Please help - Insignia NS-L37Q-10A. Same symptoms except i did detect sound at one time. Turns on - 'Please Wait' - then black screen altho in the dark I can see some light at top center. no other indication that the screen is alive. I am having trouble removing back, tho. Seems like there is something attached around the I/O connectors. Do I need to remove the VGA posts?

[Agent24]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Do I need to remove the VGA posts?

The little hex screw\nuts? They usually do attach to the case on things for physical support when you plug the cable it.

[shumiron]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

I got the back cover off. i checked voltages on power board and only have 5 V on the two 5 V pins. All other pins show nothing. Any ideas on what may be wrong with the power board?

[Agent24]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

If all you get is the 5v standby rail, it sounds like the mainboard is not sending PS_ON signal to tell the PSU to come out of standby.

To check if the PSU is OK, try disconnecting the PSU from the mainboard, then jumping PS_ON to +5v standby rail via a 1K resistor and see if the PSU turns on. Check the voltages again and see if they are OK.

[shumiron]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

OK. I will report back later today. Thanks for the info. One item of interest, tho, is that when I turn TV on the 'Please Wait' graphic appears for a few seconds then the unit is dead, altho i did hear some sound when I hooked up to XBox with HDMI.

[shumiron]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

I jumpered 5 V to the PS_ON and all the voltages on the power connector are correct. What next? Main Board problem?

[budm]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

OK. I will report back later today. Thanks for the info. One item of interest, tho, is that when I turn TV on the 'Please Wait' graphic appears for a few seconds then the unit is dead, altho i did hear some sound when I hooked up to XBox with HDMI.

The main board did send the PS-ON, BL-ON otherwise you will not have backlights and sound. So verify that when it goes black after few seconds the PS-ON and BL-ON are still present. If there is no backlights but the sound still keeps on working then the PS-ON did not go away.

[shumiron]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

Thanks, Bud. I have gone to your site with all the helpful pictures and info....plus the bootiful kitty. I need to check again tonite if the back light is completely on. I checked a couple nights ago and it seemed the light was on in a small area of the screen near the top center. I checked the power supply connector without connection to main board. I can't seem to get the meter probes to get far enuff in to the connector to contact the metal. So when I was checking voltages before the PS_ON signal wasn't getting back to the power board since I had the connector off. I will do some more testing with all connectors attached.

[budm]

Re: INSIGNIA NS-L47Q09-10A: No Sound, No Picture

This model has many different versions, so which are your boards:
http://www.shopjimmy.com/catalogsear...+NS-L47Q09-10A