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).
If your system hangs on these codes, the motherboard has detected a hardware mismatch or a failure during the hand-off between the BIOS and the hardware components. 1. Memory Incompatibility Intel Desktop Board 21 B6 E1 E2 Er
Intel boards from the "Desktop Board" era (like the DH61, DP45, or DX58 series) often encounter BIOS hangs if a peripheral is incompatible or if a previous update was interrupted. Troubleshooting Steps Insert only stick into the primary slot and try to boot
Using high-density RAM modules not supported by older chipsets. 2. CMOS Battery Failure If your system hangs on these codes, the
Follow these steps in order to clear the error and restore your system to a bootable state. Step 1: Reseat the RAM Power off and unplug the PC. Remove all RAM sticks. Clean the gold contacts with isopropyl alcohol.
Codes like can indicate insufficient voltage to the CPU. Ensure the 4-pin or 8-pin CPU power connector is firmly seated and that the PSU is providing stable 12V rails. Step 4: Disconnect Peripherals