[Karen W.]

We had a power outage the other day.. I shook my flashlight quickly to turn off my computer and monitor etc, because the power kept surging! when the power came back on I turned off the flashlight and restarted my TV and CD player. I then moved the flashliht to the desk by the TV. When suddenly I noticed a beautiful light show which became much more beautiful as I moved it closer to the TV.
Problem being now, I can't get the beautiful colors out of my TV. The flashlight is non battery it is a magnet that is shaken back and forth inside the case in a copper like contact! Anyway here are the results!
 
Here is my emergency flashlight!



















Ok Have I permanently killed off my picture tube, or is there some way to de-magnetize or whatever my TV! HELP!!!!! LOL

[neilep]

ARRGGGGGGGGGGGHHHHHHHHH !!!


Karen...this is the worst thing you can do !!


There IS a fix unless you have damaged it big time....turn off your monitor/TV !!...and turn it off NOW and leave it off for a few few hours......even better over night !!..if you are really lucky then all will be normal when you turn back on !

magnets are seriously offensive to CRT Tvs and monitors !!..that is why modern day home cinema speakers are magnetically shielded..


I know you will hate to do this but do it it now...turn off the monitor/TV and leave it for a few hours ....hopefully...the damage you have done is just temporary !!!

[Karen W.]

OH Crimany sakes... OH lordy.. I did not do it to my monitor.. just my TV!!! It is now off.. I hope that this works! Although it was only a twenty dollar TV.. LOL But dang it has been nice seeing movies again.. LOL...

Now that we know I am a complete dunderhead who likes pretty colorful light shows could you explain what happens when this occurs exactly why etc?

[neilep]

yes......the magnet attracts magnet fairies who play inside the CRT tube inside your TV...they ' large it up ' disco style and enjoy the light show of their party...to them..it's like a laser show in a club !!

If that does not convince you then this dubious link to wiki will.....it takes you direct to the magnet section

...sorry, you cannot view external links. To see them, please REGISTER or LOGIN

[kdlynn]

i don't know if it's permanent, but magnets are very very bad for tvs and computers

[paul.fr]

http://www.thenakedscientists.com/forum/index.php?topic=8118.0

[Karen W.]

yes......the magnet attracts magnet fairies who play inside the CRT tube inside your TV...they ' large it up ' disco style and enjoy the light show of their party...to them..it's like a laser show in a club !!

If that does not convince you then this dubious link to wiki will.....it takes you direct to the magnet section

...sorry, you cannot view external links. To see them, please REGISTER or LOGIN

Thanks for the fairy story Neily! LOL Thanks for the wiki link also.. if it does not go away I will pull out me soldering gun and try the cure from wiki! LOL see if I can do some more damage! LOL!

[Karen W.]

http://www.thenakedscientists.com/forum/index.php?topic=8118.0

Thanks Paul for the link!

[Karen W.]

http://www.thenakedscientists.com/forum/index.php?topic=8118.0

Yes As I have found out! LOL what appliance is next on me list! LOL..I will not play with my computer ...she is to important! LOL

[Karen W.]

Are they still dangerous by the TV if it is turned off? The TV I mean!

[paul.fr]

Are they still dangerous by the TV if it is turned off? The TV I mean!

I believe so.

[Karen W.]

Thanks Paul!

[Karen W.]

YAYYYYYYYYYYYYYY SHE LIVES !!!! YAYYYYYYYYYYYYYY SHE LIVES !!!! YAYYYYYYYYYYYYYY SHE LIVES !!!! YAYYYYYYYYYYYYYY SHE LIVES !!!! YAYYYYYYYYYYYYYY SHE LIVES !!!! YAYYYYYYYYYYYYYY SHE LIVES !!!! YAYYYYYYYYYYYYYY SHE LIVES !!!! YAYYYYYYYYYYYYYY SHE LIVES !!!! YAYYYYYYYYYYYYYY SHE LIVES !!!! YAYYYYYYYYYYYYYY SHE LIVES !!!! Thanks Neily!!

[daveshorts]

The problem was that you magnetised the grill in the front of your TV, this will deflect teh electrons that paint the picture causing them to end up in the wrong places, and hence give the wrong colours.

TVs have demagnetising (degaussing) coil that applies a very rapidly changing magnetic field to the TV which is changing faster than the grill can magnetise, so it has the effect of demagnetising the grill.
The short buzzing sound you hear when the TV turns on from cold is from these coils.

I guess the reason Neil told you to turn off the TV for a while is that it may not bother degaussing unless it has been off for a while???

[Karen W.]

Thanks Dave.. That is a cool explanation also! I am glad to say She is ok..HEE HEE HEE No thanks to me..I just thought wow thats really pretty and then I played with it. wasn't till I turned it off that I saw it wasn't leaving my screen...WHOOPS! I had even taken pictures cause it was so bloody cool!

[daveshorts]

We did this experiment on the show this week, I have written it up here:
http://www.thenakedscientists.com/HTML/kitchen-science/exp/magnets-and-tvs/

[lyner]

You need to turn it really off - plug -out type off. - not just standby or it won't try to degauss itself.
A local TV repair man should be able to de-gauss the  set for the cost of a call-out, if it doesn't fix itself. His degaussing coil is stronger than yours. It should work - the dynamo magnet isn't that strong.

[syhprum]

Altough all TV's are fitted with auto-degaussing the thermistor type devices that control the current surge to the degaussing coils often fail with age.
these devices only cost a pound or so or can easily be salvaged from old computer monitors from you local dump.
They are only three terminal devices and need the minimum of soldering skills to replace.

[Karen W.]

Thank you Sophiecentaur and Syhprum! I have some skill with soldering.. Luckily It fixed itself but for the next time I don't use my brain I wilol keep that in mind!