there is possibility of two complaints.
1, The SMPS power supply fault
2. the mother board fault.
if the SMPS is faulty the you can rectify the problem. If it is with the mother board the you have to contact the manufacturer .
First of all you have to check the SMPS ( switch mode power supply). you have to check the voltages at it secondary stage. 5v, 12v, etc switched-mode power supply
(switching-mode power supply
, or simply switcher
) is an electronic power supply
that incorporates a switching regulator in order to be highly efficient
in the conversion of electrical power. Like other types of power
supplies, an SMPS transfers power from a source like the electrical power grid
to a load (e.g., a personal computer) while converting voltage
characteristics. An SMPS is usually employed to efficiently provide a
regulated output voltage, typically at a level different from the input
for checkin the SMPS voltaes you need a multimeter. And check the voltages at it secondary stage
Added the inside view of BD 1600
if there is no outputs from the smps then you have to replace the SMPS drive STR ic near the big capacitor. Also ty to replace the OPTO coupler ic. y have to check the all resistors near the ic.
Remember one important thing that the capacitor can hold charge for some time even if you disconnect the power. so after removing the power. remove the SMPS very carefully. discharged the capacitor using a bulb.
i have also added a video for SMPS working for you reference will hep you for repairing your one