I cannot get my tv to turn on. There was a power surge here and after that my tv won't turn on(it also blew a fuse in my vcr). A friend of mine said there is a fuse in the tv that might need to be changed. Is this true? Any help would be great!!!!
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Re: TV will not work
Your friend is correct there is a fuse in your televisions's power supply. Now I do not however suggest that you open the TV set and try to find it, because it's not like the old days where the fuse was located in or around about the same area in most TVs . The fuse in this case might be towards the middle of the set or on the power supply board in any location so finding the fuse will be the biggest chore. However here are some simple instructions of how you might be able to find the fuse.
1. unplug the TV 2 take the back off of the tv 3. using a flashlight look for a component that looks like two round metallic cylinders separated by a glass cylinder. 4. remove the fuse from the fuse holder 5. visually inspect the fuse for internal burning (black soot) 6. if possible test the fuse with an ohmmeter should read 0 ohms 7. Replace the fuse with one of the same voltage and current rating (check for replacement fuses at radio shack or some place like that) 8. After the fuse is replaced try to turn on the TV before putting the back on "BE VERY CAREFUL DANGEROUS VOLTAGES ARE PRESENT" 9. If the TV comes on you are read to turn the TV off and put the back of the TV back on. 10 If the TV does not come back on you will have to get the set looked at by a qualified TV technician since if the TV does not come on it may be the result of a power supply malfunction.
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Most likelly you have had a power surge through your house and it blew the fuse inside the tv. If you take the back panel off the fuse will be by the power cord becarefull and pop out the old fuse if its burnt or the metal wire is missing on the inside then you just need to replace the fuse with the same amps and voltage as the old fuse. If you read the motherboard where the fuse goes it will tell you what type of fuse it calls for.And when tvs work fine one dau and then the next wont even make a sound when hitting the power button 9 out of 10 times the fuse is the issue. GOOD LUCK too you and HOPE this helps!!! Good day!!
You may be on the wrong track here.......fly backs are a common failure,but not because of power surge. Most commonly the problem would be on the primary side of the power supply ,such as the rectifiers and sw mode regulator. If you want to prove it,just un solder the horiz out transistor(q401) and the pin of the flybackit connects to...... and if it still blows fuse ,you need to work on the power supply.......not the horiz/hv area
a fuse is a small glass tube about 3/4" to 1". it is located near the end of the power cord inside the tv. it is located in the power board supply circuit.
there are several reason why fuse blew up.
1. sudden surge current/voltage in your area
2. shorted in either power supply or horizontal deflection circuits.
when replacing fuse, be sure to change it with the same value. but if after replacement has been done and the fuse blew again, there is a short in the circuit as stated in reason no. 2.
refer to a qualified service technician if you are not inclined with this job. good luck!