Insignia NS-LCD47HD-09 Blue Led No Picture

[TJM2005]

Hello, I have an Insignia NS-LCD47HD-09 , that has no picture, or backlight. When you plug the tv into the wall the led blinks 1 purple, 5 red, then solid red, when you press the power button the led goes blue, press it again, it blinks 15 red, then solid red.

PS Voltages:
ON/OFF - 3
DIM - 3
12v- 12
GND 0
24v- 24
PS ON -3
5v - 5
Big Caps - Stand By 165 / ON 385

INVERTER Voltages:

FMB1 - 0
VBL - 24
GND - 0
I_PWM - 3
BLON - 3

DM IN -1

TCON Voltages:
GND - 0
SDA - 3
VIN - 12
SCL - 3
TSTPGM - 0
VCOM - 5
VDD - 3

Any info or help would be great, im no tv expert, but I cant seem to figure this thing out, none of the caps look bad, and I did buy an ESR cap tester, all the caps ESR's where under the values in the chart that came with the meter, unless I missed one. I tried spraying some of the chips with freeze spary, but that didnt seem to help. Iv had all the cables off and back on, and all the board out to look for burns. Just read on testing voltage regulators, but have not tested any of them yet. Not sure of the proper way, to decide which board is causing the problem from here. I added some pictures of the boards.

Thanks for any help.

[Steve.E]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

I have this exact same television and it exhibits the same problem you described in your post. I would be interested in knowing if you have you received any replies as to what might be the problem.

[budm]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

You have all the correct signals and voltages.
It is one of those CMO inverter board, check that F1 1A fuse, more likely to be open. I fixed so many of these CMO inverter board due to this bad fuse. You can use low ohm resistor such as 1 Ohm 1/4W in its place to try it out if the fuse reads open.

[TJM2005]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Sorry it took me so long to get back, I ordered a main board and it took forever to get here, it didn't help so I got on here and saw budm's post. And he is the man of the day, thanks Budm your my hero of the day I was about to take a hammer to it lol.
I'll attach the pictures of the fix, i put a pico fuse back in with short wire leads, and some hot glue to keep it from shorting out.
YA!

[budm]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Glad to hear that it was just a simple fuse.

[nourtonyg]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Where exactly is this inverter board? I can't seem to find it.

[selldoor]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

There is a picture showing it in situ? - probably under a plate.
There is also a picture of the leads/connector so just look for the leads and follow them.

[nourtonyg]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

My inverter boards look different, and i can't seem to find the F1 fuse on both boards.

I have the same light code on the power led.

Should i just replace the inverter boards?

[nourtonyg]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

I followed the cables, but like i said, the boards look different. The F1 fuse is not in the same place, and i have scoured both boards.

[selldoor]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Good clear pictures required so we know what you are looking at.

[nourtonyg]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Sorry about that, i figured as much, but was just testing to see if i would even get a reply. I've never joined a real tech forum before. Thanks again for your help.

I've scoured the master inverter board, and i found an F1 fuse finally. But its only marked 15, not 20 as the other board was. Remember i have the same model tv.

I have attached pictures. I have marked the 15 F1 fuse.

Please let me know if you need more pictures...and thanks again. Trying to gift this tv to my sister who needs one.

[selldoor]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Ok - You will get replies until it is fixed or we are stuck
You may have the same set but the boards are frequently different- manufacturers
amend them as they go, sometimes using totally different boards which is why we tend to ask for pictures in most cases.
Can you test the fuse? - do you have a multimeter and soldering iron.
There are other fuses on this board - white ones. I can only be sure about one as it is
on the enlarged section. Can you post 3 or 4 pictures going end to end slightly overlapping so we can see it all.
This is labeled the Master board - is there a slave or secondary board as well?

[budm]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

"I have marked the 15 F1 fuse." That will be .75A, I use 1A PICO II in its place. So check its resistance, then you can also check and see if it has 24vdc on both ends with ref to chassis ground and the TV is powered on.

[nourtonyg]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Thank you. I do have a multimeter. I can use that.

Here are some detailed pictures. There is one suspicious white fuse one the master board. Its marked, and labeled F1 with a 3 on it.

I have put in order more detailed pictures. with both inverter boards.

Part 1 of 2

[nourtonyg]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Part 2 of 2

[nourtonyg]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Thank you, i will try that.

[selldoor]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Any progress or are you waiting for more ideas?

[nourtonyg]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

Thanks for your help guys. I screwed up the board, I am just going to order another inverter board set. I found one for only 50. Do you think that would solve the issue? i would think so.

[budm]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

"I have attached pictures. I have marked the 15 F1 fuse." We still do not know if that fuse is good or bad?

[bemouse]

Re: Insignia NS-LCD47HD-09 Blue Led No Picture

[HOPE THIS IS THE RIGHT PLACE TO POST?]

Hi I have this same problem, same tv.
tv was hooked up to satalite- composite in and computer hdmi in..plugged into a power strip/surge protecter... after a power surge (lighting) tv was totally dead-nuthing.. replaced power supply and now this problem... any idel what the 5 & 15 flashes mean ? was thinking main board ... but will check fuses on inverter first...thanks