Re: Lenovo Ideapad 120S - 11IAP Unknown chip heating!

so thanks to your schematic I did a lot of measuring and it turned out, the be a faulty IO CHIP. The complete 3.3V rail is shorted.

As I removed the ENE KB9028Q all shorts where gone. Directly at the Chip where multiple short (about 6ohms) between VCC 3.3 and GND.

So I will order a new one, and lets see if it comes back to life

Hey Guys,

I bought some broken Laptops from an Amazon Liquidation seller and now I am trying to fix as much as possible.

They where pretty cheap so failing ist not an drama

Tools I own: Hot Air Gun
Soldering Station Daytools LS-937
USB-Microscope

So acutually I should be ready to do all possible solder work.

As I put some Voltage on the told Mainboard, I first used the USB-C port. Which showed no reaction at all. No charging light and no warming components.

Then I saw, that it has an...

Re: New Members - please post your introductions here

Hey Guys, I am michael from germany.

I am really interested in fixing electronics. To get some experience, with the tools like hot air gun etc I always buy some broken laptops or something to test it out. Sometimes the faults can be hairpulling....

My gaming-mainboard for example it just suddenly died. and with my grown experience I looked for the fault on it. But sometimes you can't fix it... The was an short between inner layers... Even when I removed the southbridge chip, there was still nearly...