no need to worry-it's meant to do that. The tv is 'degaussing' and is perfectly normal!

Thank you Simon!

Should the degaussing take place also when the TV i switched of. I tought degaussing only was on when powering up the tube. The sound is static crackle and appears to be random like the sound you get when you have a comb through the hair on a cold and dry winters day.

My 2003 RF Avant 28" crackles for a few seconds after it has been powered off. I always thought it was a perfectly normal sound to emanate from a CRT...though I may stand corrected?

Pretty much all CRT TVs do that. It's just the high voltage of the tube discharging, and it may crackle as well when it gets charged when you turn the TV on.

Degaussing indeed happens only when you turn the TV on (and not even then always), and sounds more like "bloingggg" - never heard an Avant though, so someone else may have a more accurate onomatopoetic rendition of the event 🙂

I stand corrected-you're crackling not boinging! Anyway, I've had a couple of avants and they both have crackled and continue to do so-whatever it is it's nothing to be concerned about!

Thank you very much every one! Then I will leave it as it is and continue to enjoy the nice picture and amazing sound.

/Hans

Sounds normal to me too. Both the "crackle" and "boing".

Indeed: totally normal, when switched on the tv degausses, which is a short buzz, abt 1 sec and than the EHT comes up on the tube whichis the crackle.

When powered down, modern tv's like the Avant discharge the tube/EHT circuit which again gives the crackle.

Old tv's didn't use to do so resulting in a static electricity charge left in the tube for days...

If you don't hear these sounds there would be a reason to worry :)...

PS: if it sounds more like sparks and there's a smell of ozone, that's also no good...(but that doesn't seem to be your case).