I witnessed (NON POWER related) the L1 protecting itself on loud peaks last night.
Happened during mic checks when ringing out the system for feedback.
When it got loud (that really annoying feedback sound), the L1 just goes into a self protect mode for about 3 seconds, then comes back to life.
I could see this also happening if someone yelled loudly into the mic.
Oddly, the L1 never showed signs up too hot of a signal with its led lights, but when I turned down the trim, it was fine.