hello colleague: first of all I should check the source or + b if it regulates in its voltage of 133v in C814 when giving power ... if it does not reach 133v the + b when giving power do the routine tests ... remove the Q402 salt-hor- of the board and connect a 60-75w lamp between the + b in C814 and ground and see if the source regulates in the 133v ... change the C814- 820 of 100mf x160v and C812 of 470mfx25v .. .and then give power and see if it regulates in 133v ... after stabilized the source check fli-bak if it is in good condition ... check OCP protection ... check R814 of 0.68ohm and see if it is not devalued. ... if the voltage of + b when giving power falls to almost 0v check or change the R805 of 0.33ohm x one of 0.22ohm ... the R805 is between pin3 of the STR-W6735 and mass of the primary ... regards!!