Hello friends, i have a lenovo Yoga 910-13IKB when you turn on the led come on but the screen remain black no backlight nothing, the motherboard charge the batery, and i can find almost all the power lines in the on state, cpu, ran 3v 8v is the main one even with the charger plugin, 5 v, but the GFX power line remain 0, i check for short but on the multimeter give me the sound of a short but is like the CPU when is not energized the line is on short so no good info, i check the power schematics for the GFX and it have 2 "AOZ5029Q" for the job and they are not short and they are working because i exchange 1 f
rom the gfx to the CPU and the cpu start to send Volts whit the replaced one, so the AOZ5029Q are working, i check the lines
the 5v is present and the 8v, i gess the gate is the PWM_GT2 FCCM_GT? and they have 2.3 v so there is working, but is not working so i don't know what else try
It maybe is the on board ran that is bad? and if the ran is not good it will not energize the gfx power line? i upload the schematics and hope any one can help me whit this
