Thanks for your reply.
You're right, I found some threads on the topic (but no complete association though)
https://forum.pjrc.com/threads/60278-Teensy-4-0-SMD-Repair-missing-capacitor-value...
Hello,
While soldering headers for the central 24-33 pins on the teensy 4.0 backside, I messed up and accidentally removed 2 capacitors near 25/27. The teensy does not boot since.
Do I have a slight chance to save...