SK0-005 troubleshooting Practice Question

Exhibit

Error: Boot device not found.
Please install an operating system on your hard disk.
Hard Disk: (3F0)

Refer to the exhibit. What is the most likely cause of this error?

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The boot order is set incorrectly

The error 'Boot device not found' with 'Hard Disk: (3F0)' indicates the BIOS cannot find a bootable device. The most common cause is an incorrect boot order, where the system is trying to boot from a non-bootable device before the hard drive. A corrupt boot sector would give a different error (e.g., 'Missing operating system'). A loose cable could cause the drive not to be detected at all, but often the system would show no hard drive in BIOS. A failed drive would typically be detected but unbootable.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
The boot order is set incorrectly
Why this is correct
If the BIOS is set to boot from a non-bootable device (e.g., network or USB) before the hard drive, it will fail with this error. Correcting the boot order resolves it.
✗
The hard drive data cable is loose
Why it's wrong here
A loose cable would often result in the drive not being detected at all, not just a boot error. The error specifically mentions hard disk (3F0), suggesting it is detected.
✗
The boot sector is corrupted
Why it's wrong here
A corrupt boot sector typically produces an error like 'Missing operating system' rather than 'Boot device not found'.
✗
The hard drive has failed
Why it's wrong here
A failed drive would typically not be listed as 'Hard Disk: (3F0)'; that identifier suggests the drive is recognized but not bootable.

About these practice questions

Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Last reviewed: Jul 26, 2026

Question Discussion

Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.

Loading comments…

This SK0-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SK0-005 exam.