hi masters

i have a laptop here that befor me someone works on board
he replace EC and heated VGA chip

now when i press power button it turnes on,use 0.25A and after about 5Sec restarts
i flash bios and ec
change ram
but no help

power rails are all on

EC_RST=3.3V
PM_SLP_S5#=0V
SUS#=3.3V
EC_ON=3.3V
PLT_RST#=0V

do you have any idea what is the problem?

thanks all

anyone?
any idea?

What are the other voltages?

+0.95VSDGPUP=0.84V
+1.05VSP=1.64V
+VGA_CORE=0.90V
+1.35VP=1.34V
+CPU_CORE=1.7V !!!!!
PU702 pin8=0.386V

should i replace pu702(CSD97374)?