Tv at standby mode blown fuse fu120 2.5A.What next to do?

U have no audio and no video which tells you that it has to be something that both systems have in common - the power supply.
Locate the PS board and check for blown fuse, burnt resistors, bad or bulging caps.

The fuse is located on switched mode power supply board. If the fuse has blown the set will be dead no standby led light on front of set also when you plug the set into a power outlet you should hear the relays clicking. if you don't hear the clicking then the fuse has blown or another part of the power supply has failed and will require service.

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have to buyand try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.If set is opened at least look for puffed up and bad caps like in thisphoto.

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.

Look at power supply board inside the set for caps like these with the tops puffed up.

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion-----top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.

You have problems with your power up circuits. It is more than likely a fuse blown in some part of the TV that is keeping it from coming on. Also almost everything from a Computer to a $10.00 Calculator starts up by running a self diagnostics test on it's circuitry and if it detects any problems it will shut down or will go into a standby mode. Your TV has detected a problem some where in the circuitry and went into 'safe' or 'standby mode'. As I said in the beginning it could be a fuse, then again it could be about anything. I'm saying fuse because the heating and cooling of the element in the fuse often leads to metal fatigue and causes them to open up. Check the back and see if it has a 'user friendly' fuse panel and go from there. Look for a 30 amp blade fuse [it will be green] and see if its blown. I think that model has a history of blowing that particular fuse. If not, and you are not experienced in TV Repair don't attempt to take the back off and fix it your self, because there's places in there that will fix you good. You will need to take to a reputable TV Repair shop. I hope it's the fuse and that this helped! dhgill1949

I am having the same problem. It happened today for the first time. This morning the TV was working, now, in the afternoon, I tried to turn it on and I get no image. I can't even access the Menu, therefore I have to stick with the HDMI connection, eventhough it would have been a good idea to try other inputs.

Hello this may be a power supply problem, but my professional guess is that your Y-Substain board has failed. Count the number of times the red light flashes, this indicates the reason of failure of the unit. After which check ur user manual for troubleshooting section, your manual may give you a listing of the number of blinks and what they mean. If you want take off the back and check the fuses on the power supply if one is blown then replace the power supply as just replacing the fuse will just blow it again. If no fuse are blown then have a technician replace teh Y_Substain Board.

it's a power supply fault, if its an LCD or Plasma TV you may be able to buy a new power supply board online. (usually about £80-120)

if your handy with electronics, you may find a blown resistor or capacitor on the power supply board.

be carefull though, the PSU board stores high voltage electricity even when unplugged!

I SUGGEST TO CHECK THE INTERNAL FUSE , IT MAY BE OPEN