Our 35" Toshiba tv has a crakling noise. It's almost like there is a bad wire, or it's picking up outside interference. For a while, we thought it was truck cb's or something like that.
We have Direct TV. They said everything was ok on their end. They said it must be the tv.
The tv is about 15 years old.
The picture and sound are both fine.
Any advice would be appreciated.
My e-mail addy is Nazz52@msn.com
Is the sound coming from the speakers or from inside the tv, like an electrical arc? It could be the high voltage wire going to the picture tube. Do not attempt to test this yourself as there is many thousands of volts on that wire even when the tv is turned off. That wire attracts dirt that may be causing it to arc.
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You may have a short or open condition in the wire/cable connecting the two. Especially the ground connection, if it gets disconnected, the the main signal wire will pick up every stray electric/electronic noise near the wire.
Line noise is feeding in from the AC line.
Use an AC liner filter to block the line noise.
RF (radio frequency) interference is being picked up by the power line or wiring.
Remove sources of RF interference, such as fluorescent lighting
or wireless devices not designed to work with audio/video equipment.
Wires between the components are on top of one of the components; the transformers are causing RF interference.
Be sure that wiring goes behind the components rather than on top or between components.
If there is an equalizer in use, there could be a ground loop.
Ground loops can be resolved by installing GLI's (ground loop isolators) on the cables connecting to the equalizer.
The "crackling noises" from the back is causing the picture to distort. 1) Either locate source of "noise" and correct or 2) Call a Service Company and get corrected. I would recommend that you DO NOT USE TV until this corrected. It may cause a fire inside your TV.
In my opinion I suspect either a bad internal connection to the built in speaker or a faulty Bluetooth connection. Does the problem occur on both the helmet and speaker? If so, then the unit has likley had a circuit malfunction. If the helmet works fine but not the speaker, then I'd guess a broken or damaged speaker and/or speaker wire. Crackling noise is typical for broken wires or lose connections. Any decent TV repair place would be able to sort through it about 10 mintues before you have to return to for factory repair.
The white dots that come and go could be what is called ignition noise. Caused by something in your residence or on the power line to your living area. You will have to do some tracking. Take a portable radio and tune it to the 550mhz, you will hear a crackle or buzz, tune to the loudest that the buzz/crackle can be heard. Walk around to see were the noise gets to be the loudest. If it gets weaker you are moving away from the source. The source could be a dimmer switch for lighting, or a loose connection on a receptcle, or in the panel box that supplies the residence. Worst case it could be entering from outside source. I have tracked ignition noise as far as two houses away that had a bad butter control on a refrigerator that was on the same power line that supplied the neighbor hood. There are so many things this day and age that could be causing your dots. Yours come and go, so you will have to track it when it is acually seen on your tv. Sounds like something on a timer like refrigerator, Furnace, etc.
Crakling sound is a symptom of loose or cold solder in amplifier section where the STK IC or Darlington transistor is located .You better re solder all parts joints there in order the crackling sound is gone.
Check wiring lead dress==if someone sloppy was
in it prior to you,the audio circuit wiring may
be picking up some noise.
2)Or,you should check the hi-voltage jumper wire
between xformer and hv divider block.It may be arcing.If so,replace the block and the hv jumper.
There could be a dust issue inside the set, or the flyback transformer, HI voltage distribution,2nd anode leads,deflection yolks could be going bad. Hard call without looking where the noise is comming from. If you know about the safety issues involved with TV repair, you should be able mto find the problem, but you have to know where to look an know where not to touch. if you have no TV exeperience, please contact a trained tech to searce this out for you, because the bite the HIGH voltage will give you, can make a grown man cry! Good Luck
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