Blinking pattern Problem Description Suggested Resolution
Green White
3 4 BIOS recovery 2 Recovery image found but
invalid
3 5 Power Rail Failure EC ran into power
sequencing failure
3 6 SBIOS Flash Corruption Flash corruption detected by
SBIOS
3 7 ME Error Timeout waiting on ME to
reply to HECI message
Wi-Fi power cycle
If your computer is unable to access the internet due to Wi-Fi connectivity issues a Wi-Fi power cycle procedure may be performed. The
following procedure provides the instructions on how to conduct a Wi-Fi power cycle:
NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device.
1 Turn o your computer.
2 Turn o the modem.
3 Turn o the wireless router.
4 Wait for 30 seconds.
5 Turn on the wireless router.
6 Turn on the modem.
7 Turn on your computer.
BIOS recovery
The BIOS recovery is designed to x the main BIOS, and cannot work if the boot is damaged. The BIOS recovery will not work in the event
of EC corruption, ME corruption, or a hardware related issue. The BIOS recovery image should be available on the unencrypted partition on
the drive for BIOS recovery feature.
Rollback BIOS feature
Two versions of the BIOS recovery image are saved on the hard drive:
• Current running BIOS (old)
• To-be-updated BIOS (new)
The old version is already stored on the hard drive. The BIOS adds new version to the hard drive, maintains the old version, and deletes
other existing versions. For example, A00 and A02 versions are already on the hard drive, A02 is the running BIOS. The BIOS adds A04,
maintains A02, and deletes A00. Having two BIOS version enables the Rollback BIOS feature.
If the recovery le cannot be stored (hard drive is out of space), the BIOS sets a ag to indicate this condition. The ag is reset in the
event it later becomes possible to store the recovery le. The BIOS noties the user during POST and in BIOS Setup, the BIOS recovery is
degraded. BIOS recovery through hard drive may not be possible, however BIOS recovery through USB ash drive is still possible.
For USB key: root directory or "\"
BIOS_IMG.rcv: the recovery image stored on the USB key.
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Diagnostics
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