Lenovo Yoga 2 11 Motherboard Voltage Readings

[daniel5455]

I have a Lenovo Yoga 2 11 When i connect ac adapter i see the white light on solid and Orange light blinking. No display. If i press power button no change. I checked the 19-20V Power rail and at the output of 2nd mosfet i get 8V. Is this normal? I check all over the board and see the 1.5v, 3V and 5V rails but what i would think would be the 19V rail i get 7 to 8V. I attached a pic of the motherboard.

[mcplslg123]

Re: Lenovo Yoga 2 11 Motherboard Voltage Readings

What to do you mean by output of 2nd mosfet?? If you are getting 8v at 4th pin(gate) and 19v on pin1-3 /pin5-8, thats ok.

[daniel5455]

Re: Lenovo Yoga 2 11 Motherboard Voltage Readings

i get 8v on pins 1-3

[daniel5455]

Re: Lenovo Yoga 2 11 Motherboard Voltage Readings

im sorry i messed up. I attached a pic with the voltage readings. You will see powersupply that outputs 8V. i dont get 20v anywhere else on the motherboard. only 8v 5v 3v and 1.5v. My question is, is this normal to have 8V for the rest of the board? I dont know what else to check to see why its not booting up.

[mcplslg123]

Re: Lenovo Yoga 2 11 Motherboard Voltage Readings

im sorry i messed up. I attached a pic with the voltage readings. You will see powersupply that outputs 8V. i dont get 20v anywhere else on the motherboard. only 8v 5v 3v and 1.5v. My question is, is this normal to have 8V for the rest of the board? I dont know what else to check to see why its not booting up.

That seems to be ok. Disconnect cmos battery for atleast 24 hours(dont power during those 24 hrs) and see if it makes any difference. Recently had a similar hp DAG31 MOBOwith similar symptoms and it worked after long cmos reset. No harm in trying. I have observed result in lemovo G560 mobo also after long cmos reset.