Lenovo Legion Y530 NVIDIA Chipset problem

[menshawy]

hi friends
i faced big problem with Lenovo Legion Y530
MB NM-B701
there is tow problems
1-screen display after about 25 sec i think that because another one re programed bios i request clean me file in this linke
https://www.badcaps.net/forum/showth...57#post1058557
2- after it works nvidia display adapter don't appear in device manager only intel adapter
i found pl5801 pl5802 pl5803 has no any volt
and its ohm is 1 ohm with GND
also i found PU5801 and PR5821 is burned
i replaced pu5801 (RT8813DGQW) with RT8813AGQW from LA-A992P
after replace PR5821 burned again
i dont sure its shorted chipset or anther components
i hope not shorted chipset

thanks

[Sephir0th]

Re: Lenovo Legion Y530 NVIDIA Chipset problem

In my opinion you can't replace RT8813D with RT8813A, because RT8813D has at Pin12 a Current Limit Setting, while RT8813A has a Softstart Function there.

And did you checked, the short is solved? From my experience when a Coil is shorted because of the Controller it can Only be because of Gate is short with Drain or Source at least at one of the Mosfets.


A General Rule when replacing components in a step down Circuit is to replace the Controller and the Mosfets too.