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Samsung hcj555w I have no power. All fuses are good.

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Replace all the electrolytic capacitors in the primary main power section .first , replace the capacitor connected with the base of the final transistor of the primary main power.

Posted on Jul 19, 2008

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No power Samsung flatscreen CRT 21 inch TV


Check its fuse. Check the rectifier diodes. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

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My Samsung lcd television recently stopped working due to power surge,is there anywhere I can fix it?and for how much?


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.4_10_2012_11_02_28_pm.jpg

If someone opens set have them look at the power supply board for puffed up caps like these that are bad.

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1 Answer

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If the fuse is burnt, the wire inside will be broken or/and the fuse is black, if you have tester measure it for conductivity with ohmmeter. Replace with the same ratings fuse. If the TV doesn't power up other parts could be burnt and need replacement

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Check the small glass fuse on the power supply. I found a close match at Radio Shack for $4.00.
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maybe you have a blown fuse,try to have a look first inside,if you have a blown fuse then replace it with the same rating,if it blows again replace your power regulator

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You will have to find the source of a major short in your power supply.Since it's a 5A i assume i imagine that's where the short is.

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your tv needs to be repaired call a tech.the tv has a defected power supply or related circuit.good luck

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yea take your tv to a tech tv has a problem in the power supply there is 10mf cap in the power supply that likes to go bad replace it if that model does not have it check regulator and the microchip.however your problem lies in the powerand related circuit.good luck

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