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Check the power supply, the high voltage circuit, which near where the plug-in from the 120 volts. There is a capacitor rated 450 volts at 100 uf (microfarad). (Could be more than one capacitors). The high voltage at the capacitor should be around 390 volts, anything less and you will need to replace this capacitor (or capacitors). Replace with a 300 uf at 400 to 450 volts. Got mine off some old power supplies.
High voltage circuit is bad and usually is the capacitor that needs to be changed. Open up the back of the TV, and there are three boards. The one with the power cord is the power board/circuit. Change the capacitor - a 450 volt 100 uf. It should be at least 300 uf if not 400 uf at around 400 to 450 volts.. Samsung was trying to save money.
First thing to do is see if the main fuse is blown, if it is then the power supply needs to be changed or the hot side of the board serviced. Use extreme caution if working on the hot side of the power supply board as there are DC voltages over 300 volts there...If the fuse is good check the 5 volt standby supply voltage, generally on Vizio its pin 1 but there will be a legend to tell what pin it is. if its around 5 volts its good, if not the power supply low side has issues, and sometimes this is bad capacitors. Next thing to check if you have 5 volts is the PS on terminal , find the correct pin get your meter on it and turn the set on, the 0 volts with the set off should go to about 3.5 volts, if it does then the main board is good and its a power supply issue, if you don't see about 3.5 volts then look at a bad main board, There is a fuse in the main board that can be tested but its rare its bad...Hope this helps some
6 red flashes- backlight issue, bad main board, or power board or inverter boards- check standby volts on power board. "backlight on" volts should be 3-5v from main logic board then 24v to inverter
Have this from a youtube link find BUT
Better is to look first also on bad leaking or bulged capacitors thats better to replace in the bad components to get a repair because active components died on bad capacitors but after a while because on the build-in protection circuit by faults like deformed or leaking capacitors and even several fuse resistors then after replace a complete board again after a while you will may be get the same kind of problems again, take If you find some or much bad capacitors replacements 10 volts dc higher . begin with control on the power supply first of all.
Sanyo TVs usually only have two boards in them , doing a
visual inspection of the power supply capacitors usually reveals swollen
or bulging capacitors.
If the capacitors look good, voltage checks would be needed to isolate the problem to either the main board or power supply. Check for 5 volts to the IR board (& or keyboard) , if five volts is present suspect the main board
Hello There are two possibilities for the fault symptom. The first one is, with a short ted component, Horizontal Output Transistor. This transistor can be located very near to LOT [Line Output Transformer] which in turn dirves the LOT. The second one is with LOT itself. Both are irreparable components, and replacing them with same type and number is the only work that can be done. OK.
There are several versions of this model. They all have the same problem. The problem I'm speaking of , the location numbers of bad capacitors. So I will give you values and you will need to search and replace these. Find an ESR meter to locate bad capacitors. In the vertical deflection look for 50 volts at 4.7Mf, 35 volts at 100Mfs,50 volts and 25 volts at 1 Mfs. Be sure to resolder the vertical IC and don't solder the pins together. Find the smallest electrolytic caps valued at 50 volts 1 Mfs and replace these. These are scattered through out the main board. Other small caps include the 25 volt 10 Mfs, several of these as well. You also may want to inspect the capacitors near the flyback transformer and horizontal transistor and the horizontal output transistor. You will have to seek and find the weak or bad caps here. I will tell you, the shut down is mainly a capacitor issue. Caution is required when you remove these. The circuit traces in these TVs are very delicate and you can destroy this TV in seconds.Thanks for asking me and show all hands of support!
I have not repaired this model of TV. But I would certainly say you have a bad capacitor in the deflection area of the main board. If you have access to an ESR meter, you will find the culprit or culprits. I would look for a 160 volt to 200 volt capacitor with a value of 1Mf or 2.2Mf , 3.3 or 4.7Mfs.These are the majority of the capacitor values in nearly all brands that go bad. Check all the other capacitors you can, be on the look out for the 50 volt 1Mf and the 25 or 35 volt capacitors at 100 Mfs. Search, inspect and resolder any and all bad grounds. Include the vertical IC, horizontal transformer, flyback transformer and any regulating transistors mounted to heat sinks. Do not use too much solder, you do not want to short pins together. Thanks for asking and show all hands of support!
Three things to look for in service with LCD monitors, 1 bad capacitors 2 Bad transistors for the back light feeds 3 bad ic pulse chips for the Non function circuit you will not find schematics unless you peruse the patent office records, reverse engineer the circuits and you will have a schematic when the main chip fails on the vga board its time to buy a new vga video board, sounds like your board may be suffering a bad IC telling the main chip the power is OK