Won't turn on - relay clicks, power supply squeals, relay clicks, etc,
The boss just brought in his Zenith C34W37 television. When I plug it in, I hear it de-gausse (sp?), the relay clicks on, I hear the switching power supply squeal for a second or so, the relay clicks off, then on again, the power supply squeals again, and that repeats as long as the TV is plugged in.
I don't see any obvious bad caps, but I haven't really tested anything yet. To me, it sounds like something is shorted, but I don't know where to start.
Any input would help!
TIA - Mark
same problem relays click and volume comes on loud no picture and can't control anything.
An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert who has written 50 answers of more than 400 characters.
An expert who has written 20 answers of more than 400 characters.
Re: Won't turn on - relay clicks, power supply squeals,...
The television has a protection circuit. Sound like you know something about electronics so that is cool.
I suspect the HOT or High Voltage Transformer. If you want to operate on it, they typically will short externally from moisture or plastic high voltage breakdown. The TV starts, shorts as it cannot come to full high voltage, then shuts down. If your brave, you can unsolder the HOT which is the part that is on the main board or that comes from the top of the picture tube wire into a dark or spaceship type object.look underneath, sometimes they short underneath and you can scrap the carbon and get it to at least start up and work. Do not leave this as a fix as it can be a fire hazard.
The HOT is the most common. They are around 20-60 bucks. 34" TV. I am assuming this one without looking it up it is NOT a flat screen, as most do not squeal like that nor do they have to de-gausse like the old ones. I just looked it up and yes it is not a flat screen. Old school, so that is more thank likely the problem.
a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Technician (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
These flat panel Tv's, all of them, sometimes have cheap Capacitors in the power supply section. They'll keep tv off and tripping relay circuits. It's not a fault in the power supply ic's, it's a fault in the main Capacitors. The IC thinks there is a leak, so it shuts down tv. It monitors voltages through comparators, and compares them to reference voltages. So check main power Capacitors and replace as needed. A lot of Chinese made Capacitors are cheap. In the big sets, they break down a lot.
The clicks are coming from a mechanical relay in the standby supply for voltage---the standby power supply runs 7/24 if set is plugged into power.
What I would do if you are able is open set and on power board (power cord goes to it) look for and replace any filter caps that are puffed up there--the relay is possible but rarely bad in this way unless a solder connection under it is bad.
If caps are good you have a connection or bad part near the relay that likely is causing this problem.
Look closely at filter caps in power supply:
even one that is slightly puffed up can cause this, if find that and need to know what and how let me know.
reset the tv with the tv off, but plugged in hold down the soarce botton on the tv for 5 seconds it should click on and work. if not then there may be curcuit board issues. i found the same tv on the side of the road as somewone was throwing it out, it was leaning aganst their trash can. i brought it home. plugged it in and it went on and inediatly went to the orange vizio light. i rest it and it's been perfect ever since is my comoute monitor now...good luck i hope that fixes it for you..
Its a relay that cliking at the board.Theres a short circuit parts that may cause of relay on and off funtion thats why your Tv have no power.So Its better to repair and troubleshoot the power supply of your Television.
Hi, this sounds like your TV needs De-Gaussing, the screen has become magnetised and the electrons being fired at the screen are being diverted or scattered and mixed to the area's that are magnetised creating the odd colours, what you need is a de-gaussing coil, you can wave this in a pattern to de-magnetise the screen thus allowing the electrons to flow properly to the screen, it may also be the PTC on the tv's PCB near the mains input, if this is faulty the tv's own degaussing coil may not operate properly, you local TV technician maybe able to help with this as the part is specific to the TV, they maybe able to degauss it too for a small fee.
Here's a better expaliation ---> CLICK HERE <---- it shows a circular pattern here but there are many kinds of pattern magnetism can create but the colours are nearly always the same just in different places witn different strengths.
This is case of colored patches due to magnetic field,check and remove any magnetic thing close to the set, if the same problem is seen than switch off the set by main ON/OFF and switch on after about half hour,if still the problem remains than replace PTC used for de-gaussing,connected with de-gaussing coil mounted around the picture tube i.e electrically removes magnetic field every time TV is switched on.