Vizo VW46LFHDTV10A want turn on

[ronbass]

Hi guys my name is Ronnie and i have another vizio that want turn on. I do have amber light on front. I got this tv from girlfriend that had a lighting stri. I took back panel off and checked fuses and all were good no blown caps or no burnt spots on board. I had 5 vdc on ps board but no 12 or 24v. Now heres the wierd thing put ps board back in tv and it powered up about 4 times and stopped again. I need some help to lead me in the right direction troubleshooting this problem!

[DakotaKid]

Re: Vizo VW46LFHDTV10A want turn on

I have a VW46L with similar problem...I will follow along and help where possible and perhaps we can get both of our TVs up and running. I had put this one on the shelf while I worked on a couple of others so I will pull it out again. The first thing that will be asked for are pictures, 2000 x 2000 pixels or so that show plenty of detail and any observations of heat/damage/burn marks, etc. Also, any voltage readings or other tests that you have done to begin to narrow down the issue. Let's kick some tail on this one! I have a service manual but it doesn't include some important sections. It only has chapters 1-3 and 9. I need to check the site here and see if there is now a full cover to cover service manual download.

[budm]

Re: Vizo VW46LFHDTV10A want turn on

Please post GOOD CLEAR AND FOCUSED pictures of both sides of the power supply board, closed up pictures of the connectors (power supply) so we can read the labels/markings. The whole back side of the TV so we can see how all the boards are connected together.
Right now you may not have the PS_ON signal from the main board to turn on the main power supply sections.

[awyatt2]

Re: Vizo VW46LFHDTV10A want turn on

i have seen two of these in the 42" versions with bad solder joints at the power connector. dont know if they use the same psor not but might be worth a look to see if you have a bad connection on the back of the board where the pins go through.

[ronbass]

Re: Vizo VW46LFHDTV10A want turn on

OK I got to computer so i can post picturesso lets see if they are good enough from my mobile. I did not take any of the back because there were no burnt spots. Let me know if this is good enough. Thanks

[Bafury]

Re: Vizo VW46LFHDTV10A want turn on

ronbass & DakotaKid... I have available parts for your tv.. Let me know if you're interested. I have the power supply, master and slave inverter board, sound card, and remote. I do not have the main board

[budm]

Re: Vizo VW46LFHDTV10A want turn on

Well, I cannot read any labels on the connectors of the power supply to see what the pins are, way out of focus.
We are trying to troubleshoot the problem without having the boards in front of us, so good clear pictures are a must. I cannot help you much at this point since I cannot tell you where to test the voltages.

[ronbass]

Re: Vizo VW46LFHDTV10A want turn on

Here`s a couple pics of connector. Please let me know if you need anymore

[selldoor]

Re: Vizo VW46LFHDTV10A want turn on

Pictures are not much better perhaps the second one will be clear enough for Budm
In the first one have you tested the fuses?
Have you checked the mains input pins as suggested by awyatt2

[ronbass]

Re: Vizo VW46LFHDTV10A want turn on

yes the fuses are good and which connector would you be referring to with the mains

[selldoor]

Re: Vizo VW46LFHDTV10A want turn on

yes the fuses are good and which connector would you be referring to with the mains

Mains electricity power connector. 120vac

[ronbass]

Re: Vizo VW46LFHDTV10A want turn on

Yes Sir they are fine

[selldoor]

Re: Vizo VW46LFHDTV10A want turn on

Ok - In Pic 2 the end pin is marked on/off - with it all connected up can you plug it in but do not press power on and see if there is any voltage on that end pin. Set meter on 20vDC and put black probe on an earth screw and use the red to test on the pin. Actually you may as well do the whole connector list the results as:
Pin Name Actual
1 on/off 2.13v
2 12v 9.65v and so on.

Then do the test again after you press the power on button.

Then switch it off

You may need a helper for the next test. Again you have to measure pin one
same as before but hold the probes on the pin and ground and observe what happens when the power on is pressed.

[Rhetro]

Re: Vizo VW46LFHDTV10A want turn on

My compliments to SELLDOOR ! A excellent teacher with patients!

[ronbass]

Re: Vizo VW46LFHDTV10A want turn on

Power off plugged in and power on the only ones that have any power are the
three 5v which measures 5.03v and the one that has dim .23v and inv had.002
pin 1 did not read any voltage switch it on. So where do we go from here.

[retiredcaps]

Re: Vizo VW46LFHDTV10A want turn on

Check your voltage regulators on the main board. See my sig file below on how to test and report the readings in the specified format.

[ronbass]

Re: Vizo VW46LFHDTV10A want turn on

One quick question pwr switch on or off

[tom66]

Re: Vizo VW46LFHDTV10A want turn on

On, and in the "failed to start" mode.

[selldoor]

Re: Vizo VW46LFHDTV10A want turn on

Please can you update your profle with mains voltage and country.

[ronbass]

Re: Vizo VW46LFHDTV10A want turn on

U2 u6
4558 line 1 4558 line 1
h455a line 2 h455a line 2

1 0 5 .03 only pin 6 had voltage of .5-1.6
2 .06 6 .03
3 .16 7 5.58
4 5.6 8 0

u14
4953gm line 1
h4558 line2
1 .31 5 4.99
2 .31 6 4.85
3 .31 7 4.99
4 .31 8 4.85

u15
1084 line1
0740al line2
vi .32
vo .30

u17
j483 line 1
g1117 line2
1 .48
2 .78
3 .31

u19
1084 line1
0740al line2
vi .32
vo 0

u20
1084 line1
0740al line2
vi .22
vo 0

u21
j483 line 1
g1117 line2
1
2 .34
3

u31
atmlh750 line 1
02b 1 line2
1 4.75
2 .06
3 4.45
4 4.45

u32
atmlh750 line 1
02b 1 line2
1
2 .06
3 .30
4 .30

u33
atmlh750 line 1
02b 1 line2
1 4.74
2 .06
3 4.70
4 4.70

u34
atmlh750 line 1
02b 1 line2
1 4.73
2 .06
3 4.71
4 4.71