Gigabyte GA-Z77X-UD5H User Manual page 118

When the computer is turned on, is the CPU cooler running?
Check if there is display on your monitor.
Turn off the computer. Plug in the keyboard and mouse and restart
the computer.
Check if the keyboard is working properly.
Press <Delete> to enter BIOS Setup. Select "Load Optimized Defaults."
Select "Save & Exit Setup" to save changes and exit BIOS Setup.
Turn off the computer and connect the hard drive(s). Check if the system
can boot successfully.
Reinstall the operating system. Reinstall other devices one by one
(install one device at one time and then boot the system to see if the
device works successfully).
If the procedure above is unable to solve your problem, contact the place of purchase or local dealer
for help. Or go to the Support & Downloads\Technical Support page to submit your question. Our
customer service staff will reply you as soon as possible.
Appendix
A
Yes
Yes
Yes
Yes
END
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No
The power supply, CPU or
CPU socket might fail.
The problem is verified and solved.
The graphics card,
No
expansion slot, or monitor
might fail.
The problem is verified and solved.
No
The keyboard or keyboard
connector might fail.
The problem is verified and solved.
The hard drive, connector,
No
or cable might fail.
The problem is verified and solved.