Samsung PS51D8000FS not video, not power on

[exvion]

Samsung
Model: PS51D8000FS
Type: PS51D8000
Code: PS51D8000FSXRU
Version: N101

x main
MODEL NO: 50 DS XM
PCB NO: LJ41-09426A
PBA NO: LJ92-01765A
REV NO: R1.2 (10/12/17)

main board
BN41-01623

SMPS:
PB5FA (BN44-00446A) Model No. PSPF371501A)

logic board
MODEL NO: 50DF/DS LOGIC MAIN
PCB NO: LJ41-09390A
REV NO: R1.4 (10/11/26)

y-main
MODEL NO: 50 DS YM
REV NO: R1.3 (10/12/17)
PCB NO: LJ41-09427A
PBA NO: LJ92-01766A

y-buffer
MODEL NO: 50DF/DS LOGIC MAIN
PCB NO: LJ41-09429A
REV NO: R1.2 (10/12/06)

Power on Sequence
PS-ON -3.34v -0v
STBY - 5.27v -5.27v
VS-ON -0v -0v
Vs - 10.5v
Va - 0v
Logic led every 5 seconds - DRV_reset

I disconnected power cable from smps to y main, data cable from logic to y main and data cable from logic to x main, vs-208v, va-58v.
What is my next step?