Have you checked that the power button is not actually short circuit? Pin 2 of the power button is always connected to earth. When operated the button connects the earth through to the IO chipset on pins 1&3.
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Have you checked that the power button is not actually short circuit? Pin 2 of the power button is always connected to earth. When operated the button connects the earth through on pins 1 & 3 to the IO chipset.
Here’s the [document|25912] schematic that may help. (verify that the model number matches your motherboard’s model number)
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Go to p.32 to view the ''Power button for Yoga'' circuit. It connects to pin 114 of the motherboard I/O chip (southbridge) - see p.34.
+
Go to p.32 to view the ''Power button for Yoga'' circuit. It connects the earth to pin 114 of the motherboard I/O chip (southbridge) - see p.34.
Have you checked that the power button is not actually short circuit? Pin 2 of the power button is always connected to earth. When operated the button connects the earth through to the IO chipset on pins 1&3.
-
Here’s the [document|25912] schematic that may help. (verify that the model number matches your motherboard)
+
Here’s the [document|25912] schematic that may help. (verify that the model number matches your motherboard’s model number)
Go to p.32 to view the ''Power button for Yoga'' circuit. It connects to pin 114 of the motherboard I/O chip (southbridge) - see p.34.
Have you checked that the power button is not actually short circuit? One side of the power button is always connected to earth. When operated the button connects the earth through to the IO chipset.
+
Have you checked that the power button is not actually short circuit? Pin 2 of the power button is always connected to earth. When operated the button connects the earth through to the IO chipset on pins 1&3.
Here’s the [document|25912] schematic that may help. (verify that the model number matches your motherboard)
Go to p.32 to view the ''Power button for Yoga'' circuit. It connects to pin 114 of the motherboard I/O chip (southbridge) - see p.34.
Have you checked that the power button is not actually short circuit? One side of the power button is always connected to earth. When operated the button connects the earth through to the IO chipset or more correctly alters the +3V signal reference voltage that is on the same lead to the chipset
+
Have you checked that the power button is not actually short circuit? One side of the power button is always connected to earth. When operated the button connects the earth through to the IO chipset.
Here’s the [document|25912] schematic that may help. (verify that the model number matches your motherboard)
-
Go to p.32 to view the Power button circuit. It connects to pin 114 of the motherboard I/O chip (southbridge) - see p.34.
+
Go to p.32 to view the ''Power button for Yoga'' circuit. It connects to pin 114 of the motherboard I/O chip (southbridge) - see p.34.
Have you checked that the power button is not actually short circuit?
+
Have you checked that the power button is not actually short circuit? One side of the power button is always connected to earth. When operated the button connects the earth through to the IO chipset or more correctly alters the +3V signal reference voltage that is on the same lead to the chipset
Here’s the [document|25912] schematic that may help. (verify that the model number matches your motherboard)
Go to p.32 to view the Power button circuit. It connects to pin 114 of the motherboard I/O chip (southbridge) - see p.34.
Hi @capsitup ,
Here’s the [document|25912] schematic that may help.
Go to p.32 to view the Power button circuit. It connects to pin 114 of the motherboard I/O chip (southbridge) - see p.34.
Hopefully a start.