820 3437 no power no green light U1900 very hot

[funtotos]

Hello

i'm french sorry for my english .
i have logic board 820 3437 no dommage liquid , no power no fan no green light.
i changed dc-in magsafe .

PP3V42_G3H 3.44v

PPVRTC_G3H 0v

PPBUS_G3H 8.24v

PPDCIN_G3H 14.95v

SMC_BC_ACOK 3.41v

PP5V_S5 5.05

PP5V_S4RS3 0v

PP3V3_S5 3.34v

PPDCIN_G3H_ISOL 14.95v

PPBUS_S5_HS_OTHER_ISNS 8.24v

PPBUS_S5_HS_COMPUTING_ISNS 8.24

but U1900 and Y1905 are hot and PPVRTC_G3H 0v
i remplaced u1900 and y1905 but always hot .
U1900 is very hot

I'm lost . I need your help
thanks you very much