Vizio Sound Bar No Power Pls help

[Mr.Nientiendo]

Ok so I bought a non working Vizio sound bar Model
vizio s3851w-d4 iam assuming it's power board issue
Possibly a cap or any help would be much appreciated to repair

[diif]

Re: Vizio Sound Bar No Power Pls help

Photos and do you have tool to measure the ESR of the caps?

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

Hi and thnk u for replying i Ben trying to upload pictures and it won't allow me to I don't have any special machinery to test I can just test with multimeter the esr right with continuaty option if not wht If just replace all the caps would tht fix my issue Note: I noticed the 2 +24V are soldered together are they supposed to be like tht on back

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

Pictures of power board 0500-0515-2240

[diif]

Re: Vizio Sound Bar No Power Pls help

The easiest way to measure ESR is with an ESR or component tester. It can't be measured with continuity.
With the power off and disconnected have you checked any of the components for shorts, is the fuse ok, if this is open then it can indicate a failure in the hot side.
Have you checked for any voltages ?
What brand are the capacitors, randomly replacing when there is so much to test and check is rather pointless IMO.
The 24v is on the same track, doesn't matter if they are soldered together or not.

[budm]

Re: Vizio Sound Bar No Power Pls help

Hi and thnk u for replying i Ben trying to upload pictures and it won't allow me to I don't have any special machinery to test I can just test with multimeter the esr right with continuaty option if not wht If just replace all the caps would tht fix my issue Note: I noticed the 2 +24V are soldered together are they supposed to be like tht on back

So you are not getting ANY Voltage at all on the cold side?
What DC V do you get when measure right between the two legs of the main filter caps in the hot side (be real careful since you will be working in the deadly side of the circuit)?

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

The easiest way to measure ESR is with an ESR or component tester. It can't be measured with continuity.
With the power off and disconnected have you checked any of the components for shorts, is the fuse ok, if this is open then it can indicate a failure in the hot side.
Have you checked for any voltages ?
What brand are the capacitors, randomly replacing when there is so much to test and check is rather pointless IMO.
The 24v is on the same track, doesn't matter if they are soldered together or not.

Hi yes I tested the one fuse on it thts F1 and theirs Continuaty with board disconnected by it self no power and disconnected no I haven't check for voltages and so from were should bi check ? the actuall power connection were it receives power or? How I don't have a component tester I'll have to buy one later this week and no I haven't checked other components for short I'm gonna go over with multimeter see wht I find

The brand on caps very difficult to make out as well wht type they are (Samyoung) 120uf on the biggest one on the other I can't tell Brand's

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

So you are not getting ANY Voltage at all on the cold side?
What DC V do you get when measure right between the two legs of the main filter caps in the hot side (be real careful since you will be working in the deadly side of the circuit)?

Hi I don't have a component tester Wich is good one to buy tht recommend I see alot of them from china only multimeter I'll have to get one later this week I checked for continuaty with the power board disconnected and no power to it and there's no continuaty on both medium caps on the cold side 24.02V and on the hot sidebon the big cap beetween 15.24-15.25v it just going back forward some times lower

[budm]

Re: Vizio Sound Bar No Power Pls help

Hi I don't have a component tester Wich is good one to buy tht recommend I see alot of them from china only multimeter I'll have to get one later this week I checked for continuaty with the power board disconnected and no power to it and there's no continuaty on both medium caps on the cold side 24.02V and on the hot sidebon the big cap beetween 15.24-15.25v it just going back forward some times lower

Nothing to do with component tester. I am asking you to test the DC Voltage between the two legs of the main filter cap on the hot while it has AC from the outlet feeding it, you better be real careful while performing this test with live power. We need to find out if you even have 160VDC on the main filter cap or not.
"with the power board disconnected and no power to it and there's no continuaty on both medium caps on the cold side 24.02V and on the hot sidebon the big cap beetween 15.24-15.25v "
What do you mean 24.02VDC and 15.24 -15.25v If have no power to the power to the board? Very confusing. Are you saying you are getting 24.02VDC on the cold side?

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

Nothing to do with component tester. I am asking you to test the DC Voltage between the two legs of the main filter cap on the hot while it has AC from the outlet feeding it, you better be real careful while performing this test with live power. We need to find out if you even have 160VDC on the main filter cap or not.
"with the power board disconnected and no power to it and there's no continuaty on both medium caps on the cold side 24.02V and on the hot sidebon the big cap beetween 15.24-15.25v "
What do you mean 24.02VDC and 15.24 -15.25v If have no power to the power to the board? Very confusing. Are you saying you are getting 24.02VDC on the cold side?

Sry for confusion ok so with everything connected DC power and my multimeter to test the legs beetween each leg on cold side both caps are 24.02v

And on the hot side the big brown cap when I test the legs beetween it goes 15.24v to 15.25v as I go lower to the legs and Board to test it fluxiates like bounces around on the hot side with power coming from wall as DC

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

Pictures of the 2 caps on cold side both of the getting 24.02v
And the big one by self on hotside thts cap ur talking about right? on hot side15.24v to 15.25v

Update: if I put the multimer prongs to test leg a lil bit higher I'm getting 156.7dc to 157.8dc on the hot side on the big brown cap so I'm assuming no I'm not getting 160v if thts correct cap ure pointing to on hot side

[budm]

Re: Vizio Sound Bar No Power Pls help

Well, the power supply is working otherwise you will not have the 24VDC, so you should also see the 24V right at the connector pins.

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

Hi what do u mean by right on the connector pins the one with two prongs sticking out wht do u think can be the problem no power on Vizio letters light up

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

This prongs correct to the right

[budm]

Re: Vizio Sound Bar No Power Pls help

Well, you have that ONE connector(the pins are labeled with +24/+24/+24/GND/GND/GND) on the cold side that provides 24VDC to run other boards when all the connectors are back in place, so it should have the 24V right at the connector.
https://www.badcaps.net/forum/attach...9&d=1569373500
Post #9: I ask you to check the Voltage between the two legs of the main filter cap but your picture on show the Red probe on one leg, so where is the black probe that is supposed to be on another leg? But that is not important any more because you are getting the 24Vdc on the cold side without other boards connected to the power supply board, you need to have all the boards back in place and verify that the 24VDc is still present.

[budm]

Re: Vizio Sound Bar No Power Pls help

We will need the pictures of other boards to see how they are all connected together.
Do you have tools to do SMD repair?

[budm]

Re: Vizio Sound Bar No Power Pls help

This prongs correct to the right

Nope. That's 120VAC connector in hot side.
Man! I hope you DO NOT get electrocuted.

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

Sry yes it's very difficult to take picture one hand and the other to point to the prongs ok so I bassicly tested out by putting the black prong on negative and the red prong proon positive to get the 24+ I will try the other connections u mention to see wht I get

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

Nope. That's 120VAC connector in hot side.
Man! I hope you DO NOT get electrocuted.

Lol live and learn right I have some technical experience to make this far �� either way I appreciate ur help as well other others by the way I did zap my self Abit on speaker part small shock

[Mr.Nientiendo]

Re: Vizio Sound Bar No Power Pls help

Well, you have that ONE connector(the pins are labeled with +24/+24/+24/GND/GND/GND) on the cold side that provides 24VDC to run other boards when all the connectors are back in place, so it should have the 24V right at the connector.
https://www.badcaps.net/forum/attach...9&d=1569373500
Post #9: I ask you to check the Voltage between the two legs of the main filter cap but your picture on show the Red probe on one leg, so where is the black probe that is supposed to be on another leg? But that is not important any more because you are getting the 24Vdc on the cold side without other boards connected to the power supply board, you need to have all the boards back in place and verify that the 24VDc is still present.

connector(the pins are labeled with +24/+24/+24/GND/GND/GND) on the cold side that provides 24VDC to run other boards

Ok tried on this pins tht are labeled and I do have a 24v on each point here are pictures of other board let me know if I need to open it better to get better pictures tht is the only board I have removed and placed back the power board