Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

[supremacy13]

I have Vizio VX42L...no power nothing at all. The vizio logo on front bottom of TV does not come on orange or white light when press "power" on. Any idea I can get chance to fix this TV?

thanks
Bryan

[tom66]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

Sounds like a standby power failure, or a blown fuse. Start by disassembling your TV and taking pictures.

[selldoor]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

Hi if you enter VX42L hdtv10a in the search facilty above there are 4 threads regarding this tv. It may help to read them if you have not already done so. Tom has asked for pictures I will add my usual greeting telling how to post them. Please can you also update your profile with country and mains voltage.
Welcome to the forum-
We can help a lot more if you please post good clear pictures of the whole chassis, and then pictures of each board, front and back and close up of connectors, (max resolution 2000x2000 and 2MB) using the manage attachments button, which is found by clicking "go advanced" under quick reply.

Please do not post inline and offsite as they slow down the loading of pages.

Examples of what is needed
https://www.badcaps.net/forum/attach...1&d=1290283049

https://www.badcaps.net/forum/attach...7&d=1280167246

It will be useful if you can say what the supposed fault was and a bit about yourself - skills tools etc.

[supremacy13]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

I have soldering skill,pretty much skill on anything but the power supply ive look at it dont see any damage to me.

http://*************/photo/my-images...ersupply2.jpg/

http://*************/photo/my-images...ersupplyi.jpg/

2 pictures are front and back on power supply.

[budm]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

Check the bottom left connector, one of them should be labeled with 5VSTBY.
Please post the picture of the connectors of the power supply so we can read the labels on them. Please keep the picture in focus also.

[tom66]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

Since it's a Vizio and they are only sold in North America to my knowledge the OP must be on 115VAC 60 Hz.

I would check CAREFULLY across the big Rubycon 180uF capacitor. Use the 600 or 1000V DC range.

Also do check the plug fuse (do you have those in US & Canada?), it may sound silly but it has bit me before!

[budm]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

I think there is a white ceramic 5x20 mm fuse on the fuse clips on the top left of the board.

[supremacy13]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

I think ive found damage its under the power board...i took picture. Tell me if its normal or its for sure its damage. I do not know what this name of part. Here picture of damage, i marked red circle on picture.

[tom66]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

Looks like that chip had a bad day. :/ I think it's an L6562D from another post on this forum, but that might be for something else... It is likely for controlling the PFC side, so expect the MOSFET to be shorted for the PFC. Is the fuse blown on PSU?

[supremacy13]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

fuse is fine no blow fuse.

[tom66]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

Did you check it with a meter? These ICs rarely fail like that without a serious amount of energy being dumped into them.

[supremacy13]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

you said L6562D, i check ebay it has 8 legs. The bad chip I have on power board has 16 legs. Wonder where I can find those part?

[supremacy13]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

let me check ICs now

[tom66]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

you said L6562D, i check ebay it has 8 legs. The bad chip I have on power board has 16 legs. Wonder where I can find those part?

My error. I'll try and dig up the thread on this TV that had a similar power board - the numbers may be visible.

[tom66]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

Ah. L6598.

http://i.imgur.com/RtXcU.jpg

Is that board the same as yours?

[supremacy13]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

whats good numbers on ICs from meter reading?

[tom66]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

whats good numbers on ICs from meter reading?

I mean test the fuse with a meter. What do you get on 200 ohms? I find it hard to believe the fuse wouldn't blow with that damage.

[supremacy13]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

my ohms show 00.3 on fuse.

[tom66]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

Okay it's fine so the next step is to figure out how the IC has been damaged. Are any of the MOSFETs shorted? It's possible the current limit control somewhere has prevented the fuse from blowing somehow, or that the IC has failed for another reason.

[supremacy13]

Re: Vizio VX42L hdtv10a *No power, no vizio logo orange light or white light*

4 small of IC show 00.3 to 00.4. and one big IC show 9.96 and other big IC IS 10.10