MSI B650 GAMING PLUS WIFI: CPU/DRAM LEDs and no display

Record what happened before the black screen

Use this guide for B650 GAMING PLUS WIFI, not the B850, B650M or other GAMING PLUS variants. Note whether the symptom began on the first build, after a CPU change, after adding RAM, or immediately after enabling a memory profile.

These histories lead to different checks. A processor replacement raises a BIOS-compatibility question. A failure immediately after a memory-setting change makes returning to default memory operation a more useful first experiment than reinstalling Windows.

Watch the labelled LEDs through startup. MSI documents red for CPU, yellow for DRAM, white for VGA and green for the boot device on this model. Brief transitions and a persistent final light are different observations; write down the final state.

Inspect the power connections safely

Shut down, turn off the PSU and unplug mains power before re-seating components. Consult the board's power-connector diagram for CPU_PWR1, CPU_PWR2 and ATX_PWR1. Check the required CPU/EPS and main-board connections using the PSU's own documentation and cables.

Do not confuse a graphics-card power cable with a CPU/EPS cable or transfer modular cables between unrelated power supplies. A spinning fan alone does not verify that the CPU receives its required supply.

If the persistent CPU indicator began after an upgrade, check the processor's entry on MSI's compatibility page and its minimum BIOS requirement. Keep firmware compatibility separate from the physical AM5 socket fit.

Establish a controlled DDR5 baseline

The manual recommends DIMMA2 first, and DIMMA2 plus DIMMB2 for a pair. Start with one module in DIMMA2 at default memory settings. If the existing profile prevents UEFI access, use the exact board's documented JBAT1 reset procedure after disconnecting power; preserve recovery keys and any known boot/storage settings before resetting firmware configuration.

DDR5 initialization can delay the first image after memory or firmware settings change. Allow initialization to proceed without repeatedly pressing reset. Do not copy a fixed training countdown from another board as a guaranteed timeout for this one.

Compare each module in the same slot and at the same settings. If both start separately but the pair fails, investigate the kit, supported configuration and BIOS before concluding that both modules are faulty. Change one variable per test and record the result.

Follow the stage that appears next

If the board moves past CPU/DRAM and stops at VGA, check the monitor input and graphics source. Rear motherboard video outputs require a CPU that actually has integrated graphics. Otherwise the monitor must use a discrete graphics card.

If UEFI becomes visible and BOOT remains lit, you have progressed to a boot-device question. A minimal hardware test without an operating-system drive may have no boot target; that is not the same symptom as failing before the first image.

Escalate with useful evidence

Once you can enter UEFI, verify the detected CPU and memory capacity before restoring EXPO or adding more hardware. If the same CPU/DRAM stop persists at defaults with the documented layout, provide MSI with the full CPU and memory part numbers, BIOS if known, populated sockets and your module-by-module results. Avoid repeated CPU removal or speculative voltage increases as routine next steps.