Lenovo yoga 330 powers on no image

[Jeroentje]

Hello,

I have a Lenovo 330 (Yoga 330-11IGM Laptop (ideapad),Yoga 330-11IGM, Flex 6-11IGM) wich powers on but no image and only consumes 1 watt at the 230v adapter. It does charge the battery with or without ac no diffrent.
YOGA330+MB_V06


I measured the coils:

U6002 > 3,3v 2,4k ohm
U6001 > 5,2v 300k (and less) ohm
U5901 > 12,9v 114 ohm
U6102 > 0v 19 ohm
U6104 > 1v 77 ohm
U6103 > 1v 27 ohm
U6105 > 1,2V 222 ohm

at U6102 is a mosfet apw8707 located, I attach image.
I do not have schema, what would the best steps to take so the possible issue can be found/fixed.
No optical / water damage

thx

[Jeroentje]

Re: Lenovo yoga 330 powers on no image

I found some more schematic info, does anyone know what should be present at 27 ?
And what (flexiable) voltage should be present on LX ?

[Jeroentje]

Re: Lenovo yoga 330 powers on no image

any one ?

[mcplslg123]

Re: Lenovo yoga 330 powers on no image

If this ic is used in vcore circuit, then close to 1V is expected on BOOT pin.

[nouriassafi]

Re: Lenovo yoga 330 powers on no image

Here is the schematics! Should make life easier!

[Jeroentje]

Re: Lenovo yoga 330 powers on no image

thx mate !

[levent dalkılıç]

Re: Lenovo yoga 330 powers on no image

teşekkürler

[Doniciputat]

Re: Lenovo yoga 330 powers on no image

thanks master

[ktmmotocross]

Re: Lenovo yoga 330 powers on no image

did u flash bios?