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my sankey 42 flat screen just died last night. checked lead

Resolved Question:

my sankey 42" flat screen just died last night. checked lead & outlet, both giving power, but no life at all from tv. I'm on a caribbean island with no repair tech's please help!

Ken
Submitted: 3 years ago.
Category: TV
Expert:  Gina-Mod replied 3 years ago.
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Expert:  Louie replied 3 years ago.
Hi and welcome to JustAnswer,

Should you still need assistance...


Almost always, there would be an inline fuse after the power cord connector line to the circuit board inside the TV. With a completely dead TV unit, this would be the preliminary suspect, it would have blown.

How the fuse is blown would be significant. If it is a clean break, then chances are that it has blown due to a power surge and replacement should fix the problem.

If however, the blown fuse exhibits black powdery burnt markings, then it would indicate that another component has faulted causing excessive current resulting to the fuse blowing.

Options then are:
  • consider a DIY (do-it-yourself) repair if and only if comfortable working with electronic components & circuitry, use of a DVM/VOM, a soldering iron/station and safe practices with electrically powered devices. Access to a Service Manual or at the very least, a schematic diagram would be a necessity;
  • should you be uncomfortable with a DIY, perhaps your best bet would then be to consult with and/or seek the services of an authorized Service Center or a qualified professional.

Good luck and thank you for asking.


Edited by Benimur on 11/5/2010 at 4:05 PM EST
Customer: replied 3 years ago.

tried replacing the fuse as suggested (it was blown) but the new one popped immediately, leaving a black residue inside the glass. There are no service agents down here, and very few technicians - any idea what i could try next? would you have access to a wiring diagram or service manual for this unit (serial # XXXXX model Sankey CLCD-4220BL)

 

thanks

ken

Expert:  Louie replied 3 years ago.
Unfortunately, no schematics in my current location.

If the fuse blew again with burnt markings and it is in line with the power cord then:
  • the fault would almost always be with the power supply section;
  • the fault would be most likely be in the primary (HOT) side.

There are only a few components on the HOT side that could and would cause the fuse to blow:
  • biggest capacitor (unlikely but still a possibility);
  • switching regulator (least likely);
  • bridge diode (likely);
  • VDR - voltage dependent resistor (most likely).


Edited by Benimur on 11/6/2010 at 10:46 PM EST
Louie, Technician
Category: TV
Satisfied Customers: 8869
Experience: 25+ yrs. experience in the field and 3+ yrs. online, down to component level.
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