Lenovo C340 El5c3 el531 el431 la-h101p_lo2 problem

[stingerchamp]

Re: Lenovo C340 El5c3 el531 el431 la-h101p_lo2 problem

2.5 ohm resistor replace it and check , it should be max 2.05 ohm

Put 2.2 ohm resistor

[A1yn88]

Re: Lenovo C340 El5c3 el531 el431 la-h101p_lo2 problem

PUG1 switched with PUA1 to see if it does the same and the same result.
PUG1 - RT9610CGQW
PUA1 - RT9610CGQW
resistor replaced 2.2 ohm

[piernov]

Re: Lenovo C340 El5c3 el531 el431 la-h101p_lo2 problem

If it's not POSTing you have to try known good RAM stick (if it's not soldered to the board), confirm exact voltage on CPU VCore, check CPU reset signal and possibly try flashing the BIOS.
But again, if it was liquid damaged you should follow the hints first.

[stingerchamp]

Re: Lenovo C340 El5c3 el531 el431 la-h101p_lo2 problem

PUG1 switched with PUA1 to see if it does the same and the same result.
PUG1 - RT9610CGQW
PUA1 - RT9610CGQW
resistor replaced 2.2 ohm

Ic is Okay no issue earlier mentioned

now check voltage at same resistor on both sides

Btw you mentioned core is ok where did you check it?

[A1yn88]

Re: Lenovo C340 El5c3 el531 el431 la-h101p_lo2 problem

It seems that now it has other problems, it stops after 3 seconds. I lost a lot of time and money on this motherboard, I can't waste any more time. Thank you very much for your help.