04-20-2016 10:36 AM
Hello , i have a Lenovo yoga 700,14 inch , i7 skylake , 8gb ram ..blabla. and doesnt have warranty . 2 days ago it stopped detecting my power adapter. I buyed a new charger and still nothing. I also tryed to unplug the battery and plug back ..still nothing.. I have measured the voltage at the end of AC jack that connects to motherboard , and it gives 5v.
The adapter is usb type with a small corner on the right side. It has 2 output voltages : 20v ...2A and 5.2V 2 amps.
I only have 13% battery left on the laptop ..when is gone .. game over.
Can this be fixed somehow? without replacing the motherboard ? (coz it costs over 400$ ..)..
Sorry for my bad english .
PS. i also tryed to power the laptop without the battery, only with the power cable and still nothing...
04-21-2016 03:56 AM
04-21-2016 04:25 AM - edited 04-21-2016 04:26 AM
I removed the dc jack from laptop and measured the voltage... still 5V . It should give 20v ,isnt it ? Is the jack broken or im doing something wrong ?
The ac adapter has 2 output voltages ,5v and 20v .. i can plug my micro usb and charge my smartphone with it , but i dont know how it selects between this 2 voltages.
I so on internet that this type of charges (usb with a small corner) has more pins that usual usb , and the charging port can also be used as usb when you dont keep your laptop plugged on the wall,so i think that this pins "select" the input voltage .. 5v or 20v.. Or... ?!
Here is the photo. https://i.imgsafe.org/cf7b623.jpg