Hey there, i got a little question for you guys =)

i bought a broken A1990 with a shorted ppbus_g3h (5V, 0.045ma, 0.5ohms on ppbus_g3h).
I found that QA340 (gpu phase 3) was the issue and validated it by lifting LA340.

The short was gone.
I wanted to see, if the A1990 would draw 20V again, so i plugged the USB-C in and yes: 20V indeed.
I wanted to see how the Macbook would behave in this state, so i put the motherboard back inside the case and attached everything.
Plugged in the USB-C again and... i was back to 5V, 0.045ma. ppbus_g3h shorted again...

Re: Lenovo Ideapad 5 15ARE05 random freeze

Since i got no response here, i just went for my best guess and did a reflow of the cpu.
Machine works like a charm (at least for now) =)

Maybe this information will help someone in the future.

Cheers

Hi there,

i have a Lenovo Ideapad 5 15ARE05 that will freeze randomly.
Sometimes it wont even post, sometimes i can use it for a couple seconds or minutes before it completely freezes.
Sometimes the screen freezes, but still displays the last frame, sometimes (pretty rare) the screen goes black

It does not matter what i do. Installing windows, starting Fedora or just sitting in the bios. After some time it will freeze.
When the freeze occurs, the laptop draws a pretty constant wattage (it will just stay on the value that it draws, when it locks...

Re: New Members - please post your introductions here

Hey there,

my name is Simon, i am from Germany and have just started my journey into electronics repair this year =)

Since i got no real technical background, there is so much to learn for me here, but i really love the idea of keeping electronics alive as long as possible.
The fact that electronics will end in the garbage, just because one small cap or resistor has blown really bugs me.
Fwiw i am a software developer for over 10 years now.

Happy to be here and learn...