Samsung LE26 problem

Hi,

My Samsung LE26R51 LCD TV has a problem, if will not power on!

The red LED just it flashing....

The Power supply was swapped but I still have the error....

I am now 100% sure that it is a problem with the PCB main board, because I swapped the PCB with a spare one, and TV works 100%

The question is not, what is the problem with the defect PCB? I think it is a power probem on the unit....

Can anyone help...

Regards

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