Lenovo g50 usb problem

[akande]

MY LENOVO G50 is not recognize usb devices bid :ACLU9?ACLU0 NM-A311 REV1:0ttached
MY findings so far U2 IC pin1=0v,pin2,3=5v, pin4=0v pin5=1.7 pin 6.7&8=5v
uei pin33=0v i need your help pls schematic attached

[akande]

Re: Lenovo g50 usb problem

MY LENOVO G50 is not recognize usb devices bid :ACLU9?ACLU0 NM-A311 REV1:0ttached
MY findings so far U2 IC pin1=0v,pin2,3=5v, pin4=0v pin5=1.7 pin 6.7&8=5v
uei pin33=0v i need your help pls schematic attached

schematics

[ktmmotocross]

Re: Lenovo g50 usb problem

looks ok. did u have installed usb 3.0 drivers?

[akande]

Re: Lenovo g50 usb problem

looks ok. did u have installed usb 3.0 drivers?

i removed hdd , then try to boot the pc from a bootable flash driver not detected

[mcplslg123]

Re: Lenovo g50 usb problem

I think PIn4 should be 3V??

[akande]

Re: Lenovo g50 usb problem

I think PIn4 should be 3V??

what next can do to fix the prob plz

[ktmmotocross]

Re: Lenovo g50 usb problem

i was think that "#" means that is active with low, like PWRBTN#

[akande]

Re: Lenovo g50 usb problem

plz anyone i need to fix this usb prob

[tonix]

Re: Lenovo g50 usb problem

check the controllers near the usb ports

[akande]

Re: Lenovo g50 usb problem

check the controllers near the usb ports

that is U2 which the pin volt stated above

[akande]

Re: Lenovo g50 usb problem

someone help me out plz

[ktmmotocross]

Re: Lenovo g50 usb problem

in bios check option for usb

u r trying boot from usb 2.0 to usb 3.0 port so u must have been in compatible mode

[akande]

Re: Lenovo g50 usb problem

in bios check option for usb

u r trying boot from usb 2.0 to usb 3.0 port so u must have been in compatible mode

usb drive not found bios, which the pc not detecting flash drive

[ktmmotocross]

Re: Lenovo g50 usb problem

ok so buy a usb 3.0 drive and boot from it

[akande]

Re: Lenovo g50 usb problem

ok so buy a usb 3.0 drive and boot from it

before this problem arise both 2.0 and 3.0 working fine all types of flash , now no one is working

[mcplslg123]

Re: Lenovo g50 usb problem

You can try jumpering Pin4 of U2 with 3.3v but at your own risk.

[ktmmotocross]

Re: Lenovo g50 usb problem

You can try jumpering Pin4 of U2 with 3.3v but at your own risk.

better lift pin4 leg and inject 3,3V. this is without risk

[akande]

Re: Lenovo g50 usb problem

better lift pin4 leg and inject 3,3V. this is without risk

Done no luck

[ktmmotocross]

Re: Lenovo g50 usb problem

what is measures after lifting and injecting?

[ravenmx]

Re: Lenovo g50 usb problem

i have the same problem, i change u2, and u1, program bios, and it, and nothing works.