Symptoms
- System won't power on or POST after a BIOS update was interrupted or failed
- Motherboard shows a specific error LED or code related to BIOS
- Power went out or the PC was turned off during the update process
- No display and no beeps after the failed update
Likely causes
- CommonPower interruption during the flashing process corrupting the BIOS chipThis is the most common cause of a failed or 'bricked' update.
- PossibleWrong BIOS file used for the specific motherboard model or revisionEven boards with very similar names can require different, incompatible BIOS files.
- PossibleThe board's dual-BIOS or backup BIOS feature, if present, hasn't kicked in automaticallySome boards need a specific button or jumper to trigger the backup BIOS.
What to do
- Check the motherboard manual for a BIOS recovery method specific to your model, such as a USB BIOS Flashback feature.
- If your board has dual BIOS, check for a switch or button to swap to the backup BIOS chip.
- For USB flashback methods, prepare a USB drive with the correctly renamed BIOS file exactly as the manual specifies.
- Follow the exact button-press and light-indicator sequence described in the manual for your board's recovery process.
- Be patient, since BIOS recovery can take several minutes with no visual feedback beyond a blinking light.
- If your board has no recovery feature and the BIOS chip is confirmed corrupted, the chip may need to be reprogrammed by a professional or the motherboard replaced.
Tools and parts
- USB flash drive
- Motherboard manual
When to call a pro
If your motherboard has no built-in recovery feature or the recovery process doesn't work, a professional can sometimes reprogram the BIOS chip directly, or help determine if the board needs replacing.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.