220-1002 · Question #714
A customer has been using a computer to download and copy files to a USB flash drive. The customer accidentally stepped on the power strip, and the computer suddenly powered off. When the computer…
The correct answer is C. Check the boot order. A 'No OS found' error after an abrupt power loss most commonly means the BIOS/UEFI is no longer pointing to the correct boot device - either the boot order changed, or the abrupt shutdown caused the firmware to reset to defaults. Verifying and correcting the boot order is the…
Question
A customer has been using a computer to download and copy files to a USB flash drive. The customer accidentally stepped on the power strip, and the computer suddenly powered off. When the computer turned back on, it displayed an error message: No OS found. Which of the following should a technician perform NEXT?
Options
- AConnect a UPS.
- BRepair the OS.
- CCheck the boot order.
- DRun hardware diagnostics.
How the community answered
(66 responses)- A3% (2)
- B8% (5)
- C76% (50)
- D14% (9)
Explanation
A 'No OS found' error after an abrupt power loss most commonly means the BIOS/UEFI is no longer pointing to the correct boot device - either the boot order changed, or the abrupt shutdown caused the firmware to reset to defaults. Verifying and correcting the boot order is the quickest, least invasive first diagnostic step. Connecting a UPS (A) prevents future outages but does nothing for the current error. Repairing the OS (B) is appropriate only after confirming the boot order is correct and the OS partition is genuinely damaged. Running hardware diagnostics (D) is the right follow-up if the correct boot device is selected but the drive itself is suspected to be failing.
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