locoR1
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| posted on 14/2/08 at 10:00 PM |
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Help!!! Any television engineers on here?
Came home today to find the screen on our 32in telly with strange rainbow colours all over the screen :
Then I remembered my youngest getting some magnetic ball things yesterday,(you can probably guess where this is going)
I can only assume that at some point today she’s found that holding them next to the telly makes the screen look all pretty
colours 
Will it go away or is there anything I can do to fix it?
Or is it looking like my digi dash moneys going on a new telly.
Dave....
 
Description
Check out my CB500T Cafe Racer build diary
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r1_pete
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| posted on 14/2/08 at 10:11 PM |
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If it is magnets, it needs de-gausing, have a look in the instructions some tv's and computer screens had a de-gause button. Otherwise its a TV
engineer I'd think... Was a common problem when folk stood hifi speakers on the telly.
Pete.
[Edited on 14/2/08 by r1_pete]
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Hellfire
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| posted on 14/2/08 at 10:12 PM |
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I'm guessing it's a CRT not an LCD.
It's been a while since I used to mend tellies - but it sounds like the coating on the back of the screen may need re-anodising.
But nowadays it may be cheaper to buy a new one.
Steve
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iank
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| posted on 14/2/08 at 10:14 PM |
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You may be lucky, or not.
A lot of TVs have a built in degaussing circuit. You need to turn the set off at the wall for an hour or so (overnight sounds good around now) when
you switch it back on it it will try to demagnetise itself, often with a 'bonk' type noise. It might need a couple of goes.
Unfortunately my eldest trashed a set doing that, it was just too badly damaged
[Edited on 14/2/08 by iank]
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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MikeRJ
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| posted on 14/2/08 at 10:24 PM |
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CRT's have a built in degaussing coil that operates for a few seconds every time you turn the set on. If you are lucky this may be sufficient
to sort the problems out after a few power cycles. Note you need to leave it switched off for a few minutes before the device that operates the
degausser (called a "positor" ) will reset.
If the shadow mask has been strongly magnetised, then your local TV repair shop (if you can find one!) will have a hand held degaussing wand that will
fix it.
[Edited on 14/2/08 by MikeRJ]
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skodaman
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| posted on 14/2/08 at 10:39 PM |
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My kids have done this a few times using fish tank magnets. It usually goes away after a day or two.
Skodaman
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blakep82
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| posted on 14/2/08 at 10:40 PM |
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i did that with magnets to my grandmas tv when i was a nipper.
next time we went round there it looked fine
________________________
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don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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locoR1
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| posted on 14/2/08 at 10:49 PM |
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Yes it is a CRT I should have stated that in my first post.
Thanks for the replies so far just had a read through the manual it doesn’t say anything useful so it looks like ill turn if of at the wall and see
what it’s like in the morning.
Fingers crossed at least I’ve got some hope now I really thought it was scrap!
P.s the little sods hidden her magnets in case I take them away
Dave.....
Description
Check out my CB500T Cafe Racer build diary
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nick205
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| posted on 14/2/08 at 10:52 PM |
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quote:
Originally posted by locoR1
P.s the little sods hidden her magnets in case I take them away
Dave.....
Easy - take the telly away 
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iank
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| posted on 14/2/08 at 10:56 PM |
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quote:
Originally posted by nick205
quote:
Originally posted by locoR1
P.s the little sods hidden her magnets in case I take them away
Dave.....
Easy - take the telly away
Heh heh, I was going to suggest that. The threat of no TV for a week tends to sort out that kind of malarky PDQ.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Schrodinger
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| posted on 14/2/08 at 10:57 PM |
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quote:
Originally posted by locoR1
Yes it is a CRT I should have stated that in my first post.
Thanks for the replies so far just had a read through the manual it doesn’t say anything useful so it looks like ill turn if of at the wall and see
what it’s like in the morning.
Fingers crossed at least I’ve got some hope now I really thought it was scrap!
P.s the little sods hidden her magnets in case I take them away
Dave.....
Just make sure she hasn't hid them in the telly
Keith
Aviemore
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mistergrumpy
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| posted on 14/2/08 at 10:59 PM |
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Or carry the telly round the room till the screen goes fuzzy again. Thats the way to find the magnets
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locoR1
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| posted on 14/2/08 at 11:14 PM |
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Just turned it back on! 30 minutes off at the wall and its back to normal
Cheers guys looks like I’m still getting my digi dash
And she can bring her magnets out of hiding as long as she keeps them away from the telly
Dave....
Description
Check out my CB500T Cafe Racer build diary
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