Red light comes on but power button won't turn it on

SOURCE: 19in LCD TV

Right now I believe the TV is in " Protection Mode ".
Try leaving the TV unplugged for 30 minutes, that way the TV can reset itself.
If that doesn't work, most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a backlight Inverter Board.
But, I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20. And most cases the new part cost less than $15.

I hope I shed some light on the subject for you.

SOURCE: Power button flashes red. TV comes on momentarily

this is a inverter board defective. please change-it

SOURCE: Our Sony Bravia Tv was

If theres absolutely no power and no lights on, it sounds like the fuse inside the t.v.. It is pretty easy to change. You have to take out the screws on the back of the t.v. and take the back cover off. Look for a 3/4" glass tube fuse and see if the tiny wire in it is broken. Pop it out and bring it to radio shack and get a new one. Put that one in and try it, Make sure the t.v. has been unplugged for at least 2 hours before opening it so the capacitors have time to drain. They will hold power and could shock you if your not careful. Also, dont use anything metal to take the fuse out.

SOURCE: TV won't turn on.

I say press the input button until you see a picture!.

Donald DCruz

• 17130 Answers
• Posted on Jul 08, 2011

SOURCE: I have a problem with

There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering, if the set comes on/ off at times . So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.

The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.

Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing.

If the set does not go from standy than it is possible that most of these indicate that there are errors in the processing section . Since there is a possible short or leak in the circuit the output driver section can take in huge current to trip the SMPS or from advice from the micro processor. Remove the power plugs and make sure that high voltage sections are discharged of the potential stored in capacitors. Look for visible signs of leak or of busted capacitors. Look for bulged capacitors or damaged components- burnt or busted. Use a multimeter to check the continuity or shorting in components, if so detach from circuit and test . If the voltage builds up and the set power ON and then shuts up then the suspected section must be checked in detail.

The processor must have the +5 voltage to the function properly , the +B and secondary voltages also must be checked to infer the fault. Trace with caution and in running through the signal path , circuit trail.