Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

You found an open resistor and shorted mosfet?

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

The ceramic power resistor is no doubt bad, it measures open and has a crack on the backside of it , i do question the nearby components , transistor shows shorted, the old school looking resistor shows open or can get a reading don't have a clue what its value supposed to be, its color bands supposed to tell ya. and the 2 little ceramic resistor seems to be out of tolerance. i added two pics maybe you can come up with a theory of what went wrong or its job in this part of power board. and i marked what is what. k2865 shows as a mosfet or transistor not 100% on what it is, however its shorted or just not getting a reading!! anyhow. thanks tom could use some help on what is what, or least a reconfirmation. again thanks i should have spotted this before i made a post but least it may help someone having same issue with same tv.

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

The other resistors are likely reading what they do because your probes have some unwanted series resistance. Try with the probes touching, it will read something like 00.2 ohms, subtract this from your other readings to get actual resistance.

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

did the probe together test it reads 00.3 ohms seem to be within reason?

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

ahh makes sense thanks for the another tip, so those resistors are fine except the big 10 ohm and the best way to test the mosfet would be? just wanna make sure i am getting this correct on ohm 200 i read open on 2 legs and on one leg and back metal plate i get reading my dmm does have fet plug to test npn etc never totally figured the thing out. yeah i have lots to learn yet makes ya wonder how i manged to fix all those displays in the past but always learning..

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

not without this awesome forum anyhow very grateful for this site and the people in it

[vinceroger69]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

this guide is not bad for testing mosfet
http://www.4qdtec.com/mostest.html

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

thanks alot!!!!, ok the mosfet tests good so its just the one lonely cracked 10 ohm ceramic resistor gonna see if i have one if not will order provided i can find one.

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

Digikey is your friend

http://www.digikey.com/product-detai...10RE-ND/824537

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

Yeah he seems to be huh lol got it ordered, now its the waiting game, stay tuned will update results hopefully it comes to life and works. Thanks again everyone!!!

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

Well, good luck. I want a 60" plasma now, if it is just a simple resistor, I will be impressed. Then again my NEC 50" plasma was just a bad amp board, I unplugged it and it worked. That thing was beautifully overbuilt in so many ways.

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

well here is the update replaced the 10 ohm resistor made improvement, however we have a new prob area. i added a pic to show the area where it fried and i seen the flash i think we have a short in the upper power board er somthin how should i go about testing the area i marked in the pic and where the plug goes up to the upper power board kinda glad i left all the boards unplugged except the power boards cause it could have fried more.

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

Check the MOSFETs on those heatsinks for shorts - I'll bet one is shorted.

[vinceroger69]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

in post 62 the k2865 looks to be a transistor not a mosfet as the testing guide i sent you try testing it again this guide seems good
http://www.stickycarpet.com/pinx/test.html

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

and i discovered that long ic within what i circled is fried too ugh...

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

could be wrong just disappointed.... wg853p is the only thing on that heatsink on the opposite side looks like its a three phase control.

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

in post 62 the k2865 looks to be a transistor not a mosfet as the testing guide i sent you try testing it again this guide seems good
http://www.stickycarpet.com/pinx/test.html

lol yeah it fails that one sheesh...

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

just made an offer on a power board hope he takes it now when i plug this board in i should prolly leave just the power filter board and it plugged in in case there are shorts in the upper power supply how should i go about that?

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

not really down for wild goose chase of shorts and when i fried it took more then one thing with it..... i don't trust the upper unit, perhaps i should see if its got issues as well.

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

question...when i did the mosfet test how did it pass that if its actually a transistor?