Push Power button, green light goes on for a few seconds then nothing....
I started by looking at the fuse right next to the power cord where it meets the circuit board inside the tv housing. The 125V 5A fuse was burnt out. I replaced this fuse.
I tried again but same thing - push power button, little green light goes on in the front for a few seconds but then goes off and no picture or anything....
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have you checked the DC side of TV LOOK FOR ANY CAPACITORS with holes blown in them and are a of a burnt appearance , and also look for any breaks in circuit board also look for holes in circuit solder . I know this might sound silly have you checked the fuse in the MAINS PLUG ....
bamones, it`s possible but not likely, remove AC cord from wall outlet, remove back from set and follow the AC cord where it goes into the set, fuse is right beside where the AC cord attatches to the board, if the glass is black you have a dead short in the power supply, if it`s open but not black then try replacing the fuse, amperage is marked on the silver metal end of the fuse, look for a number followed by the letter "A". Example;
5A 125V would be a five amp fuse rated at 125 volts, DO NOT replace with any other value, good luck, BMW Rider
The first place to start is the outlet and check to be sure it has power. The next is to check / replace the main internal (to the tv) fuse - it's a 5A 250V GMA fuse (google image of GMA fuse). To find the fuse, unplug the set and remove the back cover of the TV - follow the power cord to where it enters - the fuse is located to the right and slightly ahead of where the power cord is attached to the board.
1.Check the power outlet where your TV is plugged. Also your power panelboard for tripped off breaker. 2. If ever, your TV won't power on, then, it needs to check your TV circuits. You can start at the power supply IC for busted part., then to the other section, (transceiver, audio, and video section)
The fuses may not be your problem--I have fixed several of these---The large power board is on the right side as you look from the back?
Lots of these sets develop bad solder connections on that board--several sites on the internet offer to have you remove and send them the board to resolder--this set used lead free solder and after some years has problems--a few I have opened had clearly broken solder joints--I usually in this case remove the board(mark all the many plugs and make a diagram) and solder almost all of it by hand----usually fixes this kind of trouble.
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I have this TV and have fixed this issue. If you cannot adjust Red or Blue convergence, then your STK ICs are defective. The signal board or Digital convergence board is not able to adjust sig lines on the deflection board so pushing buttons does nothing. The STK's are your amplifiers for vertical and horizontal. This will require dissassembly and soldering. You'll need 2 STK392-020 IC's and 125v/5A pico fuse or buss fuse..
The STK's are mounted on 2 massive heatsinks. Can't miss it. Word of advice, LABEL the 3-4 Pin plugs B,G,R from left to right. These are your Vertical and Horizontal coils for each tube. Don't mix them up. I did and the tv survived luckily. Chances are if your STK's poped, then they took out the -25v line. Take out the power supply that is mounted vertically on the right. Look for a row of axiel lead fuses with "SOC 5000" printed on it. They look like white rectangular blocks with leads. Check them all. Particularly RF817. Sits next to RF814. The service manual lists it as a fuse and NOT a Resistor-Fuse like the label suggests. I found more than one typo like this. I replaced mine with a generic 125v/5A fast blow buss fuse. Soldered in a holder for it. Should work the same.
Took me abit to realize it was a fuse on the power supply. This -25 line traces to W057/W058 next to the first STK chip. Explains the symptoms.
You will need to remove the back of the TV. Don't worry, it's not that bad.
There are 4 screws across the top, one on each side, one right next to
where the power cord goes into the back of the case, and the two more
by all of the video connections **These are the most important to
remove because they attach the main board to the back of the case.
Once you have remove the screws then the entire back of the set will
slide off. If you look where the power cord attaches to the board you
will see a small fuse. This is a 6.3 Amp 125 volt fuse. You can replace
it with a 6.3 Amp 250 volt fuse from your local Radio Shack. A four
pack costs between $3 and $5.
Make sure that you check that it works before putting it all back
together. Check for any loose connection cables while you're back
there. I found a few when I did this.
Try removing the Green CRt PC voard that is on the bottom of the green Picture tube which is the center one. Then replace the fuse and see if your set powers up if it does you need a new gree tube. Just be sure the crt board doesnt touch anything while you try it. then let me know what happened, if you need a tube they arent available new any longer but I have a source for good used picture tubes,