Re: Lenovo Yoga Flex 16 - LID Sensor Schematics



Hmm, that's what I thought, I'm puzzled as the pins read 3V when measured....

Re: Lenovo Yoga Flex 16 - LID Sensor Schematics

That's what I thought, but it's not; yes there is a flex cable connecting the boards.

What do the crosses mean on the USB board schematic?

Hello everyone,

I've got a laptop in after a screen replacement where the lid-sensor is non-responsive; I have been assured that all magnets were transferred over.

I can't physically see any hall-sensors on the board, nor will a magnet anywhere around the board do anything.

Looking at the Schematics I can find the Hall Sensor and its component designation (U14), I also note that J3 (the USB sub-board connector) has pins 26&27 as LID Signals #1 and #2 and pin 28 is +3VL VCC.




Because I couldn't visually locate...

Re: ASUS UX360UA Turns On No Image



No dice, same result. The display connectors have multiple 0 volt pins as well.



Have ordered a programmer, will arrive in a couple weeks I hope.

In the meantime, I monitored pins 5 and 6 during the boot cycle and they DO indeed fluctuate for the first 10 or so seconds before stabilising at 0V afterwards; pins 1 and 2 remain largely stable....

Re: ASUS UX360UA Turns On No Image



9.5-10 Ohms


That's what I came to believe as well, but would it be common for a BIOS chip to have 0-volt pins?

Nothing on the internal display and many 0 volt pins on the connectors connecting the screen as well; yeah the LEDs on an external keyboard do respond to lock keys.

I'm assuming the 0V coil is which is closest to the SSD powers that, would I be correct in assuming this likely won't be activated until it is called for by the BIOS?...

Re: ASUS UX360UA Turns On No Image

Thanks for your response.

I had read about certain rails always shorting to ground, but it's nice to see it in practice

I don't have one, however, this is now a good reason to get one, it's been on my bucket list for a while.

I will attempt to flash the BIOS and get back to you!

Hiya,

I'm trying to delve into the world of electronics repair, this forum has been of great help in my research to date, but today I am here with a question of my own.

I've been given an ASUS UX360UA to work on, the laptop powers on and charges, the keyboard 'lock' keys respond correctly and the USB port receives power, however, the OS does not seem to load up as I get no HDMI output or sound when I plug in the USB. I also see no obvious thermal mass through a Seek CompactPro.

I've taken measurements off of the motherboard and found that one of the coils...

Re: New Members - please post your introductions here

Hey,

I'm getting started out in the world of repairs.

Great to be here!