Re: Case of study - Lenovo Legion Y530-15ICH

Hi to all. The machine is working after reflow the PCH. So my rework process was not well adjusted.
All working fine... BUT when the GPU install the drivers on windows, after some minutes, seconds (random time), the laptop lose the image and frozen.
Having to turn off the machine while leaving the button pressed. When booting and logging in, it loses the image again and freezes.
That's why I think I now have a VRAM or GPU problem. Is MATS compatible with laptop GPUs? Or, it only working with desktop GPU
...

Re: Case of study - Lenovo Legion Y530-15ICH




YES xD but they sell it like original, NEW 100% tested no fake...


I ordered another one. Germany, elecronicloop....

Re: Case of study - Lenovo Legion Y530-15ICH




I saw it! I have been a follower of the channel for a long time. I know, it's a lottery... sometimes I have bought bga as a cpu for example... and it worked correctly. But I don't think this one... The pch has a crystal (YH2) that is not oscillating when the machine tries to start.

Although I am a newbie with the oscilloscope and I don't know if I will have it correctly configured to measure crytal.

I'm thinking about re-soldering it. With new balls...

Re: Case of study - Lenovo Legion Y530-15ICH



Hi to all. First at all, thanks!
I try with the original charger, with the same result. And to use the lab power supply i put a resistor (1.2K) in paralel, from ID to GROUND (see it in a forum) to simulate a 130W charger. Same result withouth the resistor.
Ill go to check ID pin. I should have a comunication, right?




I know... the 3v low side mosfet was burned. Well no mosfet in there.... just a hole. I needed to rebuild the track from his gate and now i have 3 and 5 volts. The...

Hi all!
I am self-taught in motherboard repair and I find myself somewhat lost.

Motherboard name: NM-B701
The info that i have:

The board arrived with a short on the 3VALW line (0.2ohms). I take out the coil and the short is on both sides. I remove the 3VALW AND 5VALW controller (RT6585) and now I only have short on the load side. I inject voltage (2v) into the 3VALW line and with the thermal camera the PCH heats up in one corner. I take it out and now 3VALW is at 270ohms. I inject 3v again and now the EC heats up. I remove it and short is gone (line...

Re: New Members - please post your introductions here

Hi! Im Alejandro from Spain. I'm trying to learn on my own and it's getting very difficult xD. I would like to be able to learn with you and from you and when possible to contribute something to the community.

And sorry for my English. Im not so good with it c: