If there is no power at all, and TV iscompletely dead, then it is either power cord or power supply.
If after the fault the TV went in standby and does not wake up, then the TV has on protect mode after detecting a fault.
When this happens higher voltages are shut down to prevent further damage.
Before calling support ensure that you have followed the indications here:
Why my TV does not start up and remains in standby.Troubleshooting basically consists in leaving the TV unplugged to drain power completely and discharge internal circuits.
The best way to contact an authorized technician is by ringing the number listed on the owners manual. Alternatively try Fixya directory here:
Fixya directory-
Consumer Products RepairTry first the troubleshooting proposed in link above. If that does not work, ring customer service.
Regarding the repair cost, this depends on the part that is defective. A common fault is the power supply, but this is not necessarily the problem.
The technician must test internal parts to find out why TV is in protect mode.A repair that involves parts replacement may start at $150/$200 if the part is PSU or convergence ICs (other common fault), to over $400 if main board, optical group, or more parts must be replaced.
For parts try
Partstore.
Regards.
Ginko.
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