Toshiba TV dead.

[markr]

It's an older TV.  Went to turn it on yesterday and nothing. It has power throw the cord. Fuse is good.  What is the next thing to check?

[HectorLooi]

First... are we in the right forum?

Second. Have you done this kind of stuff before? 

Third. Are we talking about a CRT, LCD, LED, Plasma?

[markr]

First you people are geniuses and someone here will know what to do.

Second no but I can't screw it up worse.

Third I don't even know the differences.

So what's the next step?

 

[RichardHarris123]

I would guess at a blown capacitor, crt's are easy to identify.  The old deep ones, big bulge on the back. 

[markr]

I do know what a capacitor is how do you test them?  I have a volt meter.  It's a flat screen.

[RichardHarris123]

Not a crt then. I think these are capacitors but not sure from the photos.  Do not touch, they store charge, some can be deadly.  They should be marked with micro farads. Google how to test them. 

[HectorLooi]

How old is this tv?

Have a look at this video

 

[markr]

So video said get numbers off old board and order new board.  Looked on eBay and found a guy who will repair mine for $55.  He's done 117 and has 100% feedback so I think it's the way to go.

Thanks everyone.

[HectorLooi]

But do you know which board is faulty? 

Good luck! 

[LittleWatchShop]

So, electrolytic caps deteriorate over time. For linear power supplies, this is not a serious abrupt problem. However, for switch mode supplies which are 99% of the market, aging caps are a problem because ESR increases and the supply shuts down.

I have repaired my Samsung 42" twice...both times--caps.

I don't use it any more because I got a modern huge tv.

[markr]

It won't turn on so it must be the power board.

[oldhippy]

T V these days is just full of rubbish programs. I think its better that it doesn't work. I don't own a TV I haven't had one for about 15 years. This way I don't have to buy a licence to line the corrupt BBC. 

[JohnR725]

  On 4/7/2023 at 10:47 PM, markr said:

First you people are geniuses and someone here will know what to do.

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in the old days of television repair that used to be companies I would publish service guides for the various televisions radios whatever. Don't know if those companies even exist anymore? The problem with working on electronic stuff it's the same as watch repair with a blindfold on your success is not guaranteed unless you can see what you're doing and you can't see what you're doing without the schematic unless well sometimes you can is have to be lucky or know what the problem is.

  On 4/7/2023 at 10:07 PM, markr said:

older TV

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you didn't say how old? I would start with the power supply but as it looks like a new design television the power supplies can get to be quite tricky then we go back to it be nice to have a schematic.

  On 4/8/2023 at 6:47 AM, oldhippy said:

This way I don't have to buy a licence to line the corrupt BBC

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this is America we don't need a license or have a corrupt BBC. but don't worry I'm sure we have somebody that's corrupt somewhere that's going to steal all of our money in the name of greater good.

  On 4/8/2023 at 6:47 AM, oldhippy said:

T V these days is just full of rubbish programs. I think its better that it doesn't work. I don't own a TV I haven't had one for about 15 years.

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then was so much stuff streaming do we even need a TV anymore?

 

  On 4/8/2023 at 2:55 AM, LittleWatchShop said:

I have repaired my Samsung 42" twice...both times--caps.

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in other words the days of the bad capacitors. Strangely enough the Samsung monitor I'm looking at had to replace the capacitors but it's been fine ever sense.

 

[LittleWatchShop]

  On 4/8/2023 at 6:47 AM, oldhippy said:

T V these days is just full of rubbish programs. I think its better that it doesn't work. I don't own a TV I haven't had one for about 15 years. This way I don't have to buy a licence to line the corrupt BBC. 

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Rawhide at noon, Bonanza at 1:00, Gunsmoke at 2:00, Rifleman at 2:30...what's not to like?

Bad guys dead within 30 minutes or an hour!

Edited April 8, 2023 by LittleWatchShop

[oldhippy]

I can watch all of those on my P C 

[HectorLooi]

  On 4/8/2023 at 12:54 PM, LittleWatchShop said:

Rawhide at noon, Bonanza at 1:00, Gunsmoke at 2:00, Rifleman at 2:30...what's not to like?

Bad guys dead within 30 minutes or an hour!

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Haha. A true Texan!

[RichardHarris123]

  On 4/8/2023 at 2:09 PM, HectorLooi said:

Haha. A true Texan!

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I don't watch programs about whippets and flat caps, so maybe I'm not a true Yorkshireman. Hehe. 

[Bearman]

Hello markr,

I had a Samsung tv which did something very similar. I would agree with the others that it's likely to be a capacitor. Though one thing I would try before you start unsoldering things is perhaps giving it a good clean and remove any dust. Though from you're photos it looks clean.

I limped along the Samsung for around two years with regular internal cleaning. It used to switch itself on and off when it felt like it. The cause was dust settling and shorting the legs out on the components due to poor design. A combination of badly designed vents to let out heat and poorly oriented components was perfect for dust to settle on shorting out the legs!

Good luck and keep safe