Boot issues, April Update maybe power related

same problem here
since april update
my raspberry pi doesn’t start anymore
tested with a 1.5A power supply and a 2.1A power supply
if i unplug ethernet + hdmi, i can start then i can plug hdmi + ethernet
with last update no problem at all

So are you seeing the unpower warning (rainbow square in top right)?
Otherwise not booting might have other reasons.

no rainbow square at all
i finally test with a 1A power (iphone power supply) and now it works !!!???

I have moved your posts to a new thread because if you don’t see the rainbow square then your issue is not the same as the thread you posted in.