Ctrl+Alt+Shift+R — Powerwash (factory reset) dialog. Use only if you want to erase local data and restore factory settings.
Esc + Refresh + Power — Recovery mode (boots recovery screen to restore OS). Useful for reinstalling ChromeOS; don't trigger unless recovering.
Power + Volume Up (on some models) — Enters recovery or firmware menus on certain devices; behavior varies by model.
Power + Refresh — Hard reboot (force restart). Can interrupt updates; avoid during system update/install.
Search + L — Locks the Chromebook (not harmful, but closes active session).
Ctrl+Alt+E (or Ctrl+Alt+Shift+E on some devices) — Enters developer mode prompt or toggles dev features; enabling Developer Mode will wipe local data and disable some security protections.
Ctrl+D at developer-mode prompt — Confirm enable Developer Mode (will powerwash the device).
Volume Down + Power — May trigger screenshot or boot behavior on some models; behavior varies.
Holding Power for ~10 seconds — Forced shutdown; can interrupt writes—avoid unless unresponsive.
Esc + Refresh (held while powering on) — Model-dependent boot options or debug screens on some Chromebooks.

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