Question We have several SuperServer 2027R-N3RF4+ with X9DRW-3LN4F+ motherboard, Some of the systems locks up during POST with error code B7 on bottom right of the screen. What wrong with them and how to fix it? Answer The error code B7 at the bottom right of the screen is related to memory DIMM on motherboard. One of the memory DIMM may have problem during memory checking at POST. Please check your memory. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) Y B D Y FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 18562 N/A 04/25/14     Print Answer