I'll be home soon and let you know with feedback. 😁

I think I'm an idiot. My laptop has a power supply, and I'm trying to power it from a USB-C port that only has the G and V terminals from a lab power supply connected to it. That's probably why the power supply isn't communicating.

Only in my case, whether on battery or power supply, there's a dead zone. The PQS12 doesn't open, as if it wasn't receiving a signal from the U24 to the gateway. It only works on voltage injection on the main line 16.8v

PQS12 gate opening comes from U24 Pin E8

Hello,
I'm working on a USB-C powered laptop (Thinkbook 14 G2 ITL) motherboard K051P with the TPS65994 (U24) and USB-C controller (UT1, likely JHL8040R).

Here's the current status:

U24 has both 3.3V and 5V present

The EEPROM for U24 has 3.3V on pin 8

UT1 also seems fine (has 3.3V supply)

No shorts found anywhere on the board

EEPROM was flashed and soldered correctly, the .bin file is exactly 32KB, so it looks valid


🔧 The problem is:

The second MOSFET (PQS12) is not passing 20V...

Can u send me file please?

Hello. I have a X415JA rev 4.2 motherboard. I had a short circuit on the main B+ line — the faulty component turned out to be the MP2941BGL chip. Unfortunately, before identifyingthis, I desoldered a few capacitors and a black component located around this chip. Could someone help identify what those components might have been based on the photos?...