TV is a JVC EM55FTR about 4 1/2 years old.
SOURCE: Blinking led light on Toshiba
wow i must be another one with this toshiba common problem bug. Has anyone even remotely helped on this site?
SOURCE: Monitor is black. Press power on monitor/screen shows for 1 sec
We have the same problem and think that the monitor may be getting too warm with staying on all of the time. Try to turn off the monitor when you arent using it. It might save you some time while you look for another monitor.
SOURCE: There is a dark soot-colored shadow shaped
I have had the same problem for a couple of Months . Bought my lg in March 2009, just had it diagnosed as the Screen . Apparently they are not Lg screens but a version called AUO optrix . my tv is a non economical repair and i am waiting for Currys to get back to me . let me know if i can be of any help. Mike my model number is 42LG5010 ZD
SOURCE: My sony LCD tv bottom third of the screen is
Sony is a great company. They care about their public image, which is more than I can say about most of the TV manufactures out there. The first thing you need to so is call them. The number is in your service manual.
Your TV is an LCD and the LCD panel is losing the "Timing" signal at the point were the distortion begins on the screen. This is caused by an internal connection becoming weak. The LCD panel can only be replaced to resolve the problem. This is expensive! Sony, if approached correctly (don't yell or curse) may help you with the bill. They may cover parts or labor... best case, they cover both! It's best to try... this is the only company that I know of that helps out like this. I have witnessed it several times!
I wish you luck and best wishes.
SOURCE: We have a JVC HD-ILA
Below are links for service manual, you must obtain a copy, to have even a any chance of repair. Work through the troubleshooting flow chart in the manual, this will help you isolate your issue, going darker, is usually a loss of drive, or voltage, often within the SMPSU, or HV section of the set... There simply is no way of knowing until one test and makes a hands on diagnosis. It is NOT the lamp... It seldom is.
it is my professional opinion though that everyone should take their units to their manufacturers approved service center, contacting a head office, of your unit & getting an approved service center is just SO important, even worth the extra to ship it, you see, at those places, the Engineers, are trained on the equipment you have, they usually have parts on hand, and do the job quicker. Anyway do that and get a "Quote". This way, at least, you'll know weather to repair or replace.
resources.jvc.com/Resources/.../LCT2063-001D-A.pdf - United States -
http://servicemanuals.net/ServiceManual/JVC/HD61G787/pos1/results.aspx
Below is a Training manual, this is what we engineers use to train the techs to understand and diagnose problems and how it all works, i think you will find it helpful.
http://www.4shared.com/file/s2r3DbPu/JVC_TV_TRAINING_MANUAL_by_rigo.html
Hi, well I applaud you for wanting to have a go, but you must make sure that you are starting in the right place, That is The Power Supply, as, if, that isn't right nothing else can be. But you simply cannot do anything without a Service Manual. In this it has everything one needs to repair the set. OK if it is shutting down, after that amount of time, of working and then faulting, then it is most definitely a "Thermal" problem, the way we "Find" problems such as this is "Freeze Spray" you use this on each component that is suspected of being the "Culprit" and you will soon,find that errant component. Now also not every fault is a Capacitor, I see many, many people that think, that Capacitors are always the "Culprit" now while that may be true in a few cases, a faulty Electrolytic Cap, or ordinary, Cap goes faulty, this is only a SYMPTOM, something has damaged those caps causing them to "Fail". One MUST always find the root "Cause", otherwise if you just treat, the SYMPTOM, the "Cause" will just make the "Symptom" come back, in short order, as the prime cause still, hasn't been fixed., Now Capacitors hate AC ripple, or Over Voltage. That's it. Oh.. and Heat, if these Capacitors, are too close to a Heat Source, then that's a prime cause of failure. Resistors, hardly ever go faulty, and if they do, it is generally obvious. However it doesn't hurt to check values with our Multimeter. Remember though resistors are made, with up to 20% tolerance from stated value, as such, are not too critical, unless in Timing circuits etc. Always check, the Values, of resistors, as with any other component, with the power OFF. Now Diodes especially "Zener Diode", are another thing to check, those and ordinary "Signal Diode" should always be suspect. next we have Transistors and IC's. The Transistors MUST ALL be checked to see if they have a good, "Junction" this is done, with our meter set to "Diode Test" and usually are about 0.6 to 0.7. With IC's you must check, voltage levels, or Logic Levels, going in and out, have a look at the circuit diagram, and it will tell you what they should be. It is a good idea to always measure the Power Supply voltages, see if a "Rail" is Low, that will be because some component has gone somewhat or all short circuit, to Earth, now, if the "Rail" is Higher, suspect an "Open Circuit" component, like a Diode, or Transistor. The voltages expressed in the manual are spot on, ANY variation MUST be investigated. I have been doing all this for over 30 years now, and I do indeed wish, we could have a set of "Symptoms" and be able to say.. "Oh that's the so-in-so and replace this" however unfortunately this although does happen, most "Symptoms" can have literally tens, of "Causes" all often "Interlinked" One simply has to do a methodical troubleshooting procedure, and always think, "are my Voltages Correct" as this is how, you Fix the problem, by making them so. Keep up the good work. If that link above doesn't furnish, a Service manual, it is imperative you get one, even if you must pay for it. It will pay for itself in about 2 mins.
The Tools you will need are A SERVICE MANUAL a Good Multimeter, a Signal generator, a Signal Tracer, pref an Oscilloscope, Soldering Iron, De-soldering iron, Probably, too, A SMT Hot Air desolderer (for the Surface Mount IC's), Compressed Air, An Anti-Static Wrist Strap, (MOST IMPORTANT, to prevent ESD), Cutters, Screwdrivers, sometimes, Torx, drivers too. Tweezers, are real handy, a magnifying glass, or eyepiece, a good strong white Light. OH, and you MUST have the original remote control too, (Sometimes one must obtain, purchase, a special "Servicing remote") as one needs this to "Program" the Computer in the TV, after, and during servicing, and to be able to put the TV, into "Service Mode" too.
When servicing try not to let the entire thing overwhelm you as one, treat the set as a conjunction of "Units". Meaning that we can break the unit up into sections, for instance we have a Power Supply, and Audio section, a Remote Control section, we have a Input Control section, we have a Video Control section, and so on. Now all these connect to specific parts of the circuit. Some have no relationship with each other and some are dependent upon each other. What we need to do is try to understand our "Fault" and isolate it to at least an "Area". Now when we have isolated the apparent problem, we then need to check our "Input" to that section and also the "Output" of that section, also we must first check that sections supply voltage and current, are correct. Depending on the unit being serviced, the Repair options, may be limited to changing a "Board" to clear the fault. Often these boards are exchangeable, and you get a rebate back, if when you purchase the new board, you send them you old broken board, and they then repair that, and around it goes. Other times, one must go down to "Board level" to effect a repair, always double check, before determining some component is faulty, it is best to isolate/remove, the component to test, often an "in situ" test can give erroneous reading due to "Other" components connected, altering the readings. Always replace with as good if not better components that you are replacing, skimping of component costs is counterproductive, in the long run.
It can often be a great troubleshooting method, to completely isolate the "Faulty" part of the circuit, if you can, isolate the in & out, and also remove, the "Native" power from, it too. You power from and external source, then also you can provide an External "Drive" to this circuit which you will NOW, be able to test under a, "know good" situation, which is so important to gain a benchmark for operation.
NEVER EVER simply replace a Board or Component without ascertaining WHY, it has failed, as seldom does anything spontaneously fail, unless placed under stress at all operating times, such as a power Supply or the like.
So, thats about it, Also to remember that you are dealing with a unit, that can cause a fire, or an explosion, or both, this is not to be undertaken, lightly, for instance if one services a unit, and for whatever reason say, it caught fire, and burned, say, a house down, and heaven forbid, killed, someone, the REPAIRER of the UNIT is Criminally LIABLE, just a little point to remember, to ensure you ALWAYS DO A PROPER JOB.
71 views
Usually answered in minutes!
×