insignia. no picture/back light

[tocold4u2]

i have a insignia e479mznkw1bm. i have a red stand by light.
when i push power button the stand by light turns blue.
still no picture...no sound if i hook a dvd player to it.the only response from remote is power on and power off.
reading on power board
3.079.- on/off
24.03 -. diw
11.85. - 12v
11.85- 12v
o-ground
0-
0
24.38-24v
24.38
4.01-ps on
4.96-5v

[tocold4u2]

Re: insignia. no picture/back light

main.logic has same readings. i tried to jumper the back light
but couldnt get it to come on. any clues /help here

[tom66]

Re: insignia. no picture/back light

ON/OFF is going high so that indicates main board sending inverter on signal. Double check "DIW" is not "DIM" and see if you measure ~2.4V instead of ~24V.

[tocold4u2]

Re: insignia. no picture/back light

yea that was. dim. not (diw). on/off is 3.1
dim = 3.04

[budm]

Re: insignia. no picture/back light

Can we see good clear pictures of the boards? So far it has all the correct signals and voltages.

[tocold4u2]

Re: insignia. no picture/back light

Here is a few pictures of each board

[tom66]

Re: insignia. no picture/back light

Need high resolution picture of this board.
https://www.badcaps.net/forum/attach...5&d=1391349191

[tocold4u2]

Re: insignia. no picture/back light

These are taken will cell phone cause my camer is broke

[tocold4u2]

Re: insignia. no picture/back light

Shpuldn t i get a 24v reading on inverter board ?

[tom66]

Re: insignia. no picture/back light

Cannot see anything useful in those photos, you will need to have a good camera... any chance you can borrow one?

[tocold4u2]

Re: insignia. no picture/back light

I could but would be days before i could post anything .
Net is down here. I posted this with cell. not geting 24v on inverter board.

[tom66]

Re: insignia. no picture/back light

Where are you measuring the 24V? If you have a 24V power supply to the main board (for audio) it's likely you also have 24V for inverter... so check where you're probing.

[tocold4u2]

Re: insignia. no picture/back light

I just saw where wires plug in from power supply board to inverter. it says 24v..
Well now i was probing the other side of conector n got a spark ..
Lost 12v pover ..gona re check. voltages. on power board

[budm]

Re: insignia. no picture/back light

It looks like another one of those CMO with bad black fuse with '15', or '20' printed on top. The pictures are too poor to see anything. I hope you did not damage the 12V/24V powwer supply.
On the right side of the inverter, look for fuse 'F 1A/76V'
http://assets.shopjimmy.com/media/ca...j27d023893.jpg

[tocold4u2]

Re: insignia. no picture/back light

yea budm it is a cmo inverter..looking f.or that fuse u mentioned

[tocold4u2]

Re: insignia. no picture/back light

i had .523 ohms on that. fuse f1a. but tge f 8a fuse i got nothing at all.
the f8a/125v. i got no ohms also

[budm]

Re: insignia. no picture/back light

So one of the other white fuses show as open circuit?

[tocold4u2]

Re: insignia. no picture/back light

both white fuses are open

[tom66]

Re: insignia. no picture/back light

Rare for both to be failed. What voltage do you measure on each end?

[tocold4u2]

Re: insignia. no picture/back light

i got the power supply voltages back..the. white fuses both have
24v on one end of fuse but .006 on bottom fuse and .004
on the other fuse. the one on bottom has the .006