Pattern to record: The drive is detected but no valid boot option is offered.

Record the boot configuration

Use the motherboard model and revision, not just the PC case brand, to select firmware documentation. Record POST indicators and recently changed memory, graphics or storage before returning settings to a documented baseline. One possible explanation is that legacy and UEFI expectations do not match the installed operating system.

Preserve recovery options

Firmware updates require the exact motherboard model and stable power. Changing disk layout before backup can make recovery harder.

Firmware and hardware checks

1. Reduce to known hardware, inspect POST indications and compare saved settings with board documentation.
2. Compare partition style, boot files and current firmware mode without converting the disk.

Recovery and startup checks

If the checks support this cause, restore the correct boot mode or repair the matching boot files. Verification should cover cold start, restart, memory training, storage, expansion cards and saved settings.

For an assessment of your desktop computer, contact AEPC in Burswood or call 027 908 8880. Provide the model and the conditions that reproduce this problem. Workshop visits are by appointment.