Toshiba TV not powering on?

[ben7]

Re: Toshiba TV not powering on?

You can't. I tried. The metal is all 1 piece and it runs under all the boards, and is welded to the frame of the TV. No can do.

There has to be, maybe tom66 will know.

[alexanna]

Re: Toshiba TV not powering on?

https://www.badcaps.net/forum/showth...213#post212213
look at Q880 closely for dammage if it fails realy flacky voltages will be noticed.
https://www.badcaps.net/forum/attach...5&d=1321796453
It's on the U801 power board

[Senatov]

Re: Toshiba TV not powering on?

You have the same TV and problem as me.

[Senatov]

Re: Toshiba TV not powering on?

https://www.badcaps.net/forum/showth...213#post212213
look at Q880 closely for dammage if it fails realy flacky voltages will be noticed.
https://www.badcaps.net/forum/attach...5&d=1321796453
It's on the U801 power board

I am having a problem locating the "Q880" on the actual TV, could you help?

[alexanna]

Re: Toshiba TV not powering on?

It is on one of the four corners of the board,I think it is a 5 pin thru hole attatched to a heat sink

[Senatov]

Re: Toshiba TV not powering on?

It is on one of the four corners of the board,I think it is a 5 pin thru hole attatched to a heat sink

Can you circle it on one of these pictures? I have been hunched over the TV for 30 minutes with a magnifying glass and a light trying to find it. All I can find is things that say Q8XXX, no Q880.

[Senatov]

Re: Toshiba TV not powering on?

I found "Q880A." It appears that this is referring to a heat sink. Also, how did you disconnect the SEINE board?

[Senatov]

Re: Toshiba TV not powering on?

Here is a picture of it:

https://www.badcaps.net/forum/attach...1&d=1344298458

This sounds exactly like what was said in that other thread

(https://www.badcaps.net/forum/showth...213#post212213)

Same TV, Same Symptoms, Same Problem. I think we have found the problem. How do I fix this? What needs fixing? Where do I get the parts?

P.S. We are talking about the Heat Sink, correct?

[Senatov]

Re: Toshiba TV not powering on?

Underneath that heat sink that I showed a picture of, and to the left ever so slightly, I found Q880 with no "a" at the end. It probably still refers to the silver heat sink. What could be wrong with it that could prevent the TV from turning on?

[selldoor]

Re: Toshiba TV not powering on?

No it doesnt refer to the heatsink - It is a component that is under the lip of the heatsink
attached to the vertical wall of the heatsink and soldered to the board. Alexanna has said it probably has 5 pins.
You will need to remove the board from the frame then remove the heatsink and the component to check the part number.
I dont think the seine board problem has ever been resolved.

[randtek]

Re: Toshiba TV not powering on?

The generic part # for Q880 is STRW6765. When I replace that, I also replace Q860, part # STRZ4479, as they most often seem to fail together, and they are not too expensive. I have had to replace these on numerous units of this model, as the power board has not been available for several years.

[Senatov]

Re: Toshiba TV not powering on?

What is Q880 and why does it prevent the TV from turning on?

[alexanna]

Re: Toshiba TV not powering on?

What is Q880 and why does it prevent the TV from turning on?

Here you Go

http://pdf1.alldatasheet.com/datashe...STR-W6765.html

[Senatov]

Re: Toshiba TV not powering on?

Just to be clear, the thing that needs to be replaced is this:

https://www.badcaps.net/forum/attach...1&d=1344341111

[Senatov]

Re: Toshiba TV not powering on?

The document that you provided mentions that this is an overload protector. Does this mean that the problem is over voltage? If it is not, what is wrong with that component?

[alexanna]

Re: Toshiba TV not powering on?

Yes that is STR-W6765.
On the set i was working on i noticed alot of heat or burning on the solder side of the board at Q880.

[Senatov]

Re: Toshiba TV not powering on?

Yes that is STR-W6765.
On the set i was working on i noticed alot of heat or burning on the solder side of the board at Q880.

You mean the black thing in the picture? Why is this preventing the TV from turning on?

[alexanna]

Re: Toshiba TV not powering on?

You mean the black thing in the picture? Why is this preventing the TV from turning on?

Man I am not an engineer, and they won' t even let me blow the whistle .

[Senatov]

Re: Toshiba TV not powering on?

Man I am not an engineer, and they won' t even let me blow the whistle .

Fair enough.

[Senatov]

Re: Toshiba TV not powering on?

The generic part # for Q880 is STRW6765. When I replace that, I also replace Q860, part # STRZ4479, as they most often seem to fail together, and they are not too expensive. I have had to replace these on numerous units of this model, as the power board has not been available for several years.

I found the Q860, but I am not sure what it refers to. Here is a picture:

https://www.badcaps.net/forum/attach...1&d=1344343044

UPDATE: Is it the black thing inside the metal thing?