Intel Desktop Board 21 B6 E1 E2 Er Today

The codes and E2 are almost always related to RAM. This can be caused by: Unseated RAM sticks. Dust in the DIMM slots.

Legacy Intel boards are notorious for "forgetting" their configurations if the CR2032 battery dies. This can lead to a hang at code as the board fails to read valid NVRAM data. 3. BIOS Corruption Intel Desktop Board 21 B6 E1 E2 Er

Insert only stick into the primary slot and try to boot. Step 2: Clear the CMOS Locate the "BIOS Config" jumper on the motherboard. Move it from pins 1-2 to pins 2-3 (Maintenance Mode). The codes and E2 are almost always related to RAM