Question about Samsung LN55B640 LCD TV

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I seems that the tv received power because it has red light on but it won't turn on please help me

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 8457 Answers

SOURCE: TV won't turn on, red

Tv have a power supply board problems.That the board where the tv power a/c cord plug into it.Must take the aparts to troubleshoot and repair or replace a whole refurbish tv power supply board.U have all the tools and understanding basic electronic also can do basic soldering work?Yes?Take the tv aparts and check the tv power supply board carefully looking for any dying and leaking capacitors components parts.These dying and leaking soon to be dead capacitors parts are alway bulges up or puffing up onto it tops.These dying capacitors components are the causes and the problems for tv power LED indication light flashes and clicking noises.U must replaces all these dying and leakages capacitors components parts to fixed ur tv power supply board.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Posted on Aug 31, 2011

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caroldon
  • 17130 Answers

SOURCE: TV won't turn on red lite is on

In most cases the standby light might blink with different rapidity to indicate a fault relevant to the processor. It is possible that most of these indicate that there are errors in the processing section . Since there is a possible short or leak in the circuit the output driver section can take in huge current to trip the SMPS or from advice from the micro processor. Remove the power plugs and make sure that high voltage sections are discharged of the potential stored in capacitors. Look for visible signs of leak or of busted capacitors. Look for bulged capacitors or damaged components- burnt or busted. Use a multimeter to check the continuity or shorting in components, if so detach from circuit and test . If the voltage builds up and the set power ON and then shuts up then the suspected section must be checked in detail.

The processor must have the +5 voltage to the function properly , the +B and secondary voltages also must be checked to infer the fault. Trace with caution and in running through the signal path , circuit trail.

In some cases the fault can be related to faulty connections or poor soldering joints. Here are some tips to check out weak solder or heat related faults:

There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.

The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.

Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing.


Check for tips to look into the SMPS unit with some of my tips:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Thank you for using Fixya.


Posted on Sep 15, 2011

  • 302 Answers

SOURCE: My Samsung LN40A650A tv won't

if you have no lights at all i would check the power supply.

You can get get parts for this tv at www.interliquidparts.com

Posted on Nov 26, 2011

  • 1684 Answers

SOURCE: Samsung TV won't turn on. Red light is solid, won't blink when pressed. All capacitors seem fine (none swollen or vented).

That model is covered under a class actions lawsuit settlement over bad power supply boards. You need to contact Samsung about this and get a warranty claim started, even if the original warranty is over the settlement terms will cover parts and labor. You can get additional information about this along with contact information here: http://www.ccl-la.com/blog/index.php/samsung-has-reached-a-settlement-in-class-action-lawsuit-over-faulty-tv-power-supplies/

Posted on Sep 25, 2012

  • 35599 Answers

SOURCE: PN50B550T2FXZA won't power up

The continous red light merely means power is getting to your TV. From your description, it is likely the internal power supply has failed

Posted on Dec 31, 2012

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