hifonics bxi2010d in protection mode

[ivkata]

i got 2 of those hifonics bxi2010d with the same issue :
-once conected to power source the green light illuminates for a sec and then goes to red-protection.

both units came form the same vehicle ,same issue ,both boards look mint with no visible damage.I cannot find blown fets in either power or output section ,please advise

 

[seankane]

There are 2 transistors on the audio driver board marked 1D. They are probably bad and causing the protect.

Post a photo of the board, so I can see what configuration of board it is.

 

[Perry Babin]

These.

 

[ivkata]

how do i decode what's the part number on those transistors so i can by few and swap them out ?

 

[Perry Babin]

The SMD Code Book

MMBTA42