I turned the tv on and it made a hissing sound. There was an acidic burning smell with no picture and the unit will not come on at all at this time. The tv is only 3 yrs. old, has not been moved and is in dry area. Any ideas?
Depends if you know about electronics and have SOME knowledge on how to fix them the user may well be able to source parts to fix them. Read WARNING below..
As suggested the fault could be FBT "Horizontal Output Transistor" (Check to see if shorted.) burnt out resistor or electolytic capacitor.
IF the FBT (Flyback transformer.) needs to be replaced you will want to know how to SAFELY discharge CRT HIGH VOLTAGE (WARNING CRT acts like a huge capacitor and may store around 25000Volts AND CAN KILL a person .) if unsure get qualified person to do repair.
By the way the term "No user servicable parts inside." is to keep most people safe from high voltages etc inside.
If you know where to go you can get all (Well mostly all) the parts you require.
Things to assist people to help:
Does your TV have self diagnostics? Ie. does standby led flash in a particular sequence. This will give a tech a 98% of correctly advising your fault.
If you open the case (Have good lighting.) you should be able to see a burnt out resistor with no problem as it will most likely be brown to black with unreadable color codes or value on it.
Write down the resistor PCB id eg R615 etc. (Same applies to Horizontal Output Transistor etc.) This will also assist a tech to provide correct information, and reduce the possible causes of fault..
ALWAYS remember if in doubt get a qualified person to do job.
Last time i posted the problem of my konka tv.i red somebody's sugession for solution for the problem,and i tried the tech,i found where the problem on the tv's ckt board one of the ckt part which regulates the temp. is loosen when i touched it with my screw driver while turning the tv on, the tv starts to display. check the whole circuit,u will find some problem,
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Re: TV won't come on
Really cannot help you. Could be many things. Power Regulator short Circuit, Horizontal Output Transistor and FBT ... Best get a professional to take a look. These sets are all solid state, and there are no user servicable parts inside.
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You probably have a high voltage failure causing the TV to sense the overload and shut off. There is about 30,000 volt required to light your picture tube focus the picture. If there is a failure anywhere in this circuit you will get the hissing noise and occasionally an ozone smell. I recommend you contact a TV serviceman to diagnose and repair this problem.
I assume this is an LCD tv that you have? I would think a fault has developed on your inverter board with one of the components having burnt out & shutting off the drive to the backlights hence the smell & lines on the picture. It would be advisible to take it to a repair centre to have it repaired to check the burning issue as a matter of safety
There is a burnt capacitor somewhere in the unit. Look for any burnt or swelled up capacitors. You can also usually locate a bad cap if there is burn marks on the system board. Also test power supply with voltmmeter to make sure it is a constant volt reading.
Burning smell can be caused by a blown component, a short, or dust burning inside circuits. In all cases do not turn TV on untill the TV had been tested and the problem is fixed as you risk to cause further damage to the unit.
Can you remove the rear panel and check if the hissing is coming from the flyback? Which is a large transformer with a large red wire coming from the top of it? If so can post a link where you can get a replacement their not exspensive and their easy to replace. If its not coming from the flyback post a picture of where the hissing is coming from and I will identify the parts for you, But I feel its the flyback due to the hissing. respond to this same post so I have your correct model number when you reply.
If you had a burning smell, well the board is toast. These sets are made to replace the entire board at one time. Before installing the replacement module, the picture tube should be checked. A defective picture tube ( such as a G1 short) may cause a failure in the power supply section.