TV help

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manuba
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TV help

Post by manuba » Tue May 05, 2009 10:47 am

does anyone know how to repair a full size tv? Mine has no picture and makes a HORRIBLE noise.

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Re: TV help

Post by bicostp » Tue May 05, 2009 11:10 am

Is it a really loud buzz that sounds like the hum fluorescent lights make?

Is it a CRT TV? If so, don't screw around with it. Bring it somewhere to have it fixed or buy a new TV.

Chances are there's a problem with the picture tube or flyback transformer.

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Re: TV help

Post by SpongeBuell » Tue May 05, 2009 11:29 am

bicostp wrote:Is it a CRT TV? If so, don't screw around with it. Bring it somewhere to have it fixed or buy a new TV.
Very true indeed, but it's worth saying WHY this is, too. It's not like most electronics, where the worst that can happen is that you don't fix it or make it worse, and you just throw it away. CRT TVs can KILL you. They store a ton of electricity when they're used, which doesn't really go away for a while, even when unplugged. One wrong move could be your last.

Obviously, this very well could be heard for the millionth time, but not worth taking a chance.
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Re: TV help

Post by XCVG » Tue May 05, 2009 5:21 pm

A CRT stores a ginormous electric charge somewhere. Before you do anything, you have to release the charge. Believe it or not there is a safe way to do it. Basically you shove a grounded screwdriver into a certain contact, or something like that.

Don't trust me though, I've never done it. Just google it though. "discharging a crt"

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Re: TV help

Post by palmertech » Tue May 05, 2009 8:28 pm

Please, stay out of there.

If you absolutely insist, you can drain the charge by crossing the two contacts off any large capacitors in there. It will make a big FLASH/BANG, so be prepared. Also, protip: Only work with ONE HAND! Keep your other hand AWAY from the internals. This way, if you do get shocked, it will only be across your arm, and while it will hurt like crap, you will be fine (Save for small burn marks). If you get a shock from one hand to the other, it will go straight across your heart, and possibly kill you.
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Re: TV help

Post by samjc3 » Tue May 05, 2009 8:32 pm

palmertech wrote:Please, stay out of there.

If you absolutely insist, you can drain the charge by crossing the two contacts off any large capacitors in there. It will make a big FLASH/BANG, so be prepared. Also, protip: Only work with ONE HAND! Keep your other hand AWAY from the internals. This way, if you do get shocked, it will only be across your arm, and while it will hurt like crap, you will be fine (Save for small burn marks). If you get a shock from one hand to the other, it will go straight across your heart, and possibly kill you.
so true. although it can be useful for shocking other people! put a charged capacitor in your hand, touch someone else, then let the capacitor contact your skin. if you do it right, it shocks them. if you do it wrong, ouch. :D
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Re: TV help

Post by palmertech » Tue May 05, 2009 8:39 pm

Have you seen my electrical weaponry thread?

Also, these caps are big. Like, CRAZY big.
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Re: TV help

Post by manuba » Tue May 05, 2009 8:41 pm

is is a wal-mart ilo 32", and apparently they suck.

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Re: TV help

Post by Kurt_ » Tue May 05, 2009 10:47 pm

Make a Jacob's ladder.

http://hackedgadgets.com/2006/05/24/top-5-old-tv-hacks/" onclick="window.open(this.href);return false;
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Re: TV help

Post by XCVG » Wed May 06, 2009 8:59 am

Actually, you want to put your other hand in your pocket. Or something. I don't remember very well, haven't read it in months.

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Re: TV help

Post by palmertech » Wed May 06, 2009 10:29 am

Yeah, pocket is good. The idea is ave your hand at your side or something.to keep you from accidentally reaching out if you just h
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Re: TV help

Post by Metallica Man X » Wed May 06, 2009 4:46 pm

Kurt_ wrote:Make a Jacob's ladder.

http://hackedgadgets.com/2006/05/24/top-5-old-tv-hacks/" onclick="window.open(this.href);return false;
I've got a homebuilt ladder in my basement 8)
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