Question about Philips Magnavox 20MC4304 20 in. TV/VCR/DVD Combo

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Keeps blowing fuses

When you replace fuse and plug in set in flashes and blows fuse.

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When a fuse keeps blowing, that is an indication that some component has failed and the circuit is drawing too much current. Most likely it is a problem in the power supply section or high voltage / flyback section.

Sorry to say, you will need to take it to be serviced.

Please let me know if I can be of further assistance to you.

Good luck!

- Jim

Posted on Feb 09, 2008

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Is there a specific solid state part known to make the fuse blow in model number sb350

It sounds that there is some short circuit with its main power supply regulator circuit. A detailed check is necessary to locate the exact faulty component/s. If you are sound in electronics, you can do it by yourself. If not, contact any service technician. If you wish to get more details, check this site. Pull up older posts there. Check the site with patience, as it has over 2350 posts now. All are related to electronic equipment repair help. If you check the site in Timeslide option, which can be selected from the drop down list at the top left side of the display window, it will make search easy.

Apr 21, 2013 | Emerson SB350 13 in. TV/DVD Combo

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Tv wont come on

The power supply section of your TV should be troubleshooted. Open the set, and check the fuse. There is a protection fuse fitted on the power supply section, a glass cartridge type, which can be detached from its holder. Check it for damage. You can check it with the help of a multimeter. if found opend, never put an other fuse in place. Check for the reason for present fuse to blow up. There will be some reason, without any reason, a protection fuse won't blow up. If you replace the fuse with an other one, without detecting and rectifying the reason for the blow up of fuse, it may make things more worse than preset.
Usually, power switching section will have the trouble. You must have sound knoledge in electronics to follow the work.
If you have knowledge and all tools to repair, inform me by Fixya comment box. I'm ready to assist you to repair this set. OK.

Dec 26, 2011 | Bush DVD142RC 14 in. TV/DVD Combo

1 Answer

Blowing a fuse in power supply

Hi Menard,

Make sure that you replaced the fuse with exact ratings. Low ampere ratings will not handle current as what the original fuse installed. If still fuse keeps blowing after replacing with the same rating, this is an indication that you have a short on the power supply section.It can't be fixed by replacing the fuse alone. Short usually near the AC line where parts like the following are present.

  1. Power Cord - even very low of chances but still to be check.
  2. Posistor and degaussing - even very low of chances but still to be check.
  3. Rectifier diode
  4. Main filter electrolytic capacitor
  5. Voltage regulator I.C.

This is the common parts that might be shorted and made the fuse blew. You may visit the link for more info.

If you don't have necessary tools and test instruments, and can't do the job yourself, I would advice you to look for a professional to troubleshoot the problem. Don't attempt to work in the power supply if you don't know the safety precaution of handling it, there some stored electricity enough to hurt you with a little mistake only.

Hope I helped you.
Have a nice day!

Thanks for using Fixya.

Feb 17, 2011 | Televison & Video

1 Answer

It went off on its on and won't come back on. It just popped off while I was watching it.

It likely blew a fuse. However, TVs rarely blow a fuse for no reason. I recommend getting it fixed. You can try a new fuse of the same size, but if it blows, please get it repaired. DO NOT put a larger fuse in - fire hazard. The fuse maybe solder in.

Apr 21, 2010 | Televison & Video

1 Answer

Model txl3676 Too many appliances on one plug. Instead of blowing a fuse in the house the tv Samsung made a poping noise and lost all power. I assume it was a fuse. I have taken the back off the TV but...

NEVER take the back off a CRT or Plasma TV unless you are a certified technician. There are LETHAL voltages present inside the case which can persist for WEEKS after the set is unplugge
It does not sound like "too many appliances" on a plug, although low voltage can cause higher currents and shorten the life of a device.
That popping sound was your power supply failing. This is not something you can replace yourself.
Few televisions have replaceable fuses. They depend on electronic regulation to protect circuits from overvoltages. CRT televisions use large capacitors that loose their filtering ability with age and case errors beyond the range of the protection circuit.
It must be repaired by a technician.

Jan 02, 2010 | Televison & Video

2 Answers

No power,switched outlets and checked breaker still nothing.Is there an internal fuse?

it out. If the fuses are blown, you may have lost a diode/bridge in the rectifier circuit.

fuses don't just up and blow for no reason.

buzz it out before buying any new fuses.

then try this methed

Check the fuse box or the outlet you are using for power. Easiest way to do that is to plug in a lamp into the same socket the rcvr is plugged into. If no power; reset the house breaker.

Check the power line into the set. Wiggle the cable near the two ends. They rarely go bad in the middle, but the molded ends are always going bad.

: Check for a bad fuse (most modern rcvrs do not use fuses because they have perfected the power protection and management systems to the point that a fuse is redundant. Nonetheless, some manufacturers still use a fuse)

Check the power switch. It can go bad and just won't close the connection so that the set gets power! How to check? Unplug the set totally. Remove the cover. Find the switch. Go to Radio Shack and purchase a small clip lead. Clip the lead across the switch contacts very carefully so as not to short out any other circuits. Then carefully plug the line cord in to see if you now get action.

If the set has an internal power problem, you should still be getting some indication on the front panel (unless the lamp in the standby hole is defective or burnt out).

: If you are certain the set is getting power internally and still totally dead, it is most likely the output transistors in the power stage (mounted to the heatsinks) are all dead. They will need replacing.


Aug 16, 2009 | Memorex Televison & Video

1 Answer

20 inch Symphonic TV/DVD Combo fuse keeps blowing immediately.

hello it sounds like theres a dead short unless you have a multimeter and oscilloscope a diagram and a bit of know how then yes you could do it youself i'd would get a quote for a repair good luck


Jan 17, 2009 | Symphonic SC519DD 19 in. TV/DVD Combo

1 Answer

Fuse blown

Hi mate most uk set have a 3,15amp 250v fuse ti dosent matter if its quick or slow all the best Bob

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Blows fuse

If you disconnect the degaussing coil and the set plays fine, it means one of 2 things is wrong. The degaussing thermistor could be shorted internally. I have seen this happen a few times on those degaussing thermistors that are in the little black boxes with 3 legs. Those boxes actually have 2 thermistors in them, one to do the actual degaussing and another connected directly across the AC to act as a heater for the degaussing thermistor. One of those thermistors could have "flashed over", which would blow the fuse the instant the set it turned on. The only other thing would be the wrong size main fuse. Without a degaussing coil the set probably draws about one amp, but the surge at turn-on with a degaussing coil could be as high as 4 amps. If you have the correct fuse installed and it blows at turn-on, replace the degaussing thermistor.

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Outside transformer blew, now TV doesn't work

I hope is only a fuse and it will not be hard to find it should be close to where the power cord goes in and it has to be replaced with the same amps and size.Make sure the set is not plug in whe you remove the lower back and once you replace it put the back cover on and plug it in,if more damage is present it will blow up again right away or it will blow up when you push the power button,I hope it doesn't but if it does you will need someone qualified to check the rest.Be careful

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