I have looked over the ps unit over and over and over again and do not seem to find anything wrong. This is mind boggling people. Anyone know what caps or resister or whatever is wrong with this thing that needs to be replaced? I can do the work just cant see anything causing a problem. I get the red light when I power on.
I experienced a similar problem with three FLM 2601 power supplies (from work). The two large caps that have hot melt keeping them in place are the typical culprits. They are located at one end of the module near the x-former.
Radio shack has the 35v 1000u caps for about $1.40 each.
Hope this helps.
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The problem is not the firmware. You have something wrong with the power supply that is causing it to go thru the on/off cycles. Either replace the PS or go in there and change all of the PS caps. Look for leaking, discolored and/or bulging caps on top That should do it.
although resonace does not always indicate power problems that would be the first choice.. i would say 80 percent chance that the power board is bad.. but theres always a chance that one of the other boards or even the panel could be loading the psu down
Iv the voltages are low, pull the power line from each of the other boards to see which one is dragging the voltages down. If none ovf the voltages return to the correct value, then the power supply board is gone. You can get all the repair parts you need from here: http://www.shopjimmy.com/
You might wish to unplug the TV for an hour or more. If this power reset does not allow the TV to turn on component failure is indicated. These sets are assembled using the wave soldering process they are known for having cold solder connections. The safety circuitry shuts the TV set down or will keep it from turning on when it detects a problem. This model of TV has over 2,000 parts, which includes millions of transistors inside the integrated circuits.
The capacitors will change value, leak and become defective. Resistors will change value and burn. Diodes and IC can go bad. This may have a domino effect and cause other parts to fail. Replacing one defective part may make the TV operate for a short time but the part will fail again if the parts that caused the failure to begin with are not replaced.
The only way to know for sure which parts that are no longer within factory specs and for a proper repair all the electronics must be diagnosed by someone with the correct electronic test equipment specifically designed for TV service and the skills to use the test equipment. I wish I could tell you there was a quick fix or button to push that would fix the TV but that is not the case or the solution needed to get the TV operating correctly.
It's the problem of overheating in the power supply board of the TV.on the power supply board of the TV there are few capacitors and IC.any of this IC is got short or may be weak.so due to this when you start the TV the current passes from electric outlet to the power supply board of TV.but when the current passes from that weak/faulty part at that time current gets stopped or slow and the board overheats and TV shuts off.
This is a common problem faced by many other users too.the possible option to solve this issue is to check the power supply board by a meter and continuity tester and replace the faulty component on the board which is short due to which power supply board is getting overheated.its bit technical job but yes its not at all a costly repair to do or get it done by the technician. for required parts it can be easily available from local electronic hardware shop.
You know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again. You still need to check for leakages...
Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
The power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
So u a Tech.Very common on this LCD or Plasma tv sets are dead leakage capacitors.Check all those capacitors,these capacitors alway bulges up on it top or puff up on it top.Replaced all these defective gas leakage capacitors,that bulges up on it top or puff up on it top.Ur tv will power up and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
This unit stumped me.. The reason being is that the power supply normally has 2 parts, a primary control line and then the main power supply. The purpose of the primary control line is to talk to the main control board, make sure there are no errors upon power up and then startup the set with high voltage. The problem is that the primary control portion is not working.. With that being said, it has no way to control the set for startup and initalize the processor for the video/menu. What is supposed to happen is when this is dead, the set should do nothing and the relays should be tripped going into protection fault mode. A very backwords design for failure on this unit. Anyways, replace caps c502, c503 and c521 on the main power supply unit. Replace the existing 50v .47 uf with a 1uf @ 50v to prevent the failure again. The other 2 are 47yu at 35v, I would jump the volts to 50 on that again to make sure it dosent happen. Becareful of the ps removal, the 15+ fets are screwed to the chasis and locked down do to heat, do not remove the protective coating or risk ps failure. Enjoy your tv.
With just those set of symptoms - and nothing more - my first guess is that the power supply (PS) board has a problem. It is possible to replace the entire board, but it is also possible that the board could be repaired. The PS is not an inexpensive item so my best advice would be to have a professional look at it and estimate the problem. Then discuss the options repair/replace...