--- title: "esx.problem.hardware.ioapic.missing" description: "IOAPIC is missing. Check BIOS settings to enable this IOAPIC. There is an issue with BIOS configuration for this server. See the event description for more detailed information specific to this event." canonical: "https://helpcenter.veeam.com/docs/mp/kb/esx.problem.hardware.ioapic.missing.html" breadcrumb: "Veeam MP for VMware Online Knowledge Base > Event-Based Rules > vSphere Host Hardware Warning > esx.problem.hardware.ioapic.missing" dateModified: "2026-09-10" --- # esx.problem.hardware.ioapic.missing ## Summary IOAPIC is missing. Check BIOS settings to enable this IOAPIC. ## Causes There is an issue with BIOS configuration for this server. ## Resolutions See the event description for more detailed information specific to this event. ## External Refer to the [VMware Online Documentation](https://techdocs.broadcom.com/) for more information.