Solved: 3 long/3 short beeps at boot after connecting new monitor - ... - HP Support Community - 8290950
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System Board; Diagnostic Beep Codes - HP MT EU Business PC Illustrated Parts & Service Map [Page 2] | ManualsLib
![OMEN by HP 875-0000 Obelisk Desktop PCs - BIOS Alarm Emits 3 Long and 3 Short Beeps When Video Connections Are Not Secure | HP® Customer Support OMEN by HP 875-0000 Obelisk Desktop PCs - BIOS Alarm Emits 3 Long and 3 Short Beeps When Video Connections Are Not Secure | HP® Customer Support](https://support.hp.com/doc-images/1007/c06282348.png)
OMEN by HP 875-0000 Obelisk Desktop PCs - BIOS Alarm Emits 3 Long and 3 Short Beeps When Video Connections Are Not Secure | HP® Customer Support
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