Westinghouse Sk-26h735s

[RRR13]

Hello I am new to this forum so forgive me if I miss any important details. I have three of these LCD tv and all blew at the same time it seems that power went out and none turn on now really need help dont want to spend . What they do went you power the little light light power on for a second then shuts off. at first I figured power supply board went bad but i saw one on line which has been tested for $40 bucks so i purchased one but it does the same thing after i attempt to power on the power supply keeps a small clicking noise. Due to lack of tools I purchased a new power board.coule the mainboard mosfets be bad? nothing really looks burned.

[Dgtech]

Re: Westinghouse Sk-26h735s

Please post the pictures of all boards (one unit first) as attachments. We will give you some direction to hopefully a solution.

[RRR13]

Re: Westinghouse Sk-26h735s

here are the pic thank you I manage to buy a cheap multimeter how do I go about measuring? I measured some of the mosfet on the mainboard and got .3 ohms on upper left mosfet and 2.77 k ohm on the ones to the middle right. i included power board pic but since i know thats not the problem since I purhased a working board. thanks!

[RRR13]

Re: Westinghouse Sk-26h735s

some pic can take more thanks

[mrosenberg42]

Re: Westinghouse Sk-26h735s

Something you can quickly check is the fuse on the inverter board. I circled it in the attached pic. Check whether it is short or open.

[mrosenberg42]

Re: Westinghouse Sk-26h735s

I took another look at the picture you attched of the inverter and looks as if there is another smaller fuse next to the larger one. Check them both. Here is a pic with both fuses circled.

[RRR13]

Re: Westinghouse Sk-26h735s

Checked both fuses they test ok.

[Dgtech]

Re: Westinghouse Sk-26h735s

I'd replace that FET that measured .3 ohms. Of course, once you have it out, measure it again to make sure.

[RRR13]

Re: Westinghouse Sk-26h735s

thats what I was thinking also but I cant seem to find that fet anywhere?
it has 1084-18 then 0927fL do you know what it sopposed to measure ? Thanks for your help

[PlainBill]

Re: Westinghouse Sk-26h735s

thats what I was thinking also but I cant seem to find that fet anywhere?
it has 1084-18 then 0927fL do you know what it sopposed to measure ? Thanks for your help

Probably not a FET. 1084-18 sounds like a 1.8 volt regulator. AIC1084-18 IS a 1.8 volt LDO regulator. Note that the tab (Vout) is connected to the middle pin on the other side. Pin 1 is Gnd, pin 3 is Vin. If the tab is shorted to either of the long pins on the other side you have a problem. If it is shorted to pin 3 you have a BIG problem.

PlainBill

[RRR13]

Re: Westinghouse Sk-26h735s

did some more measuring and they are not shorted. still lost ....