Check to see if the problem persists when all the external
devices are removed.
Check to see that the green light indicator on the AC adapter is
lit.
Check to see the power cord is properly plugged to the wall
outlet and to the computer.
Check to see the power indicator of the computer is on.
Check to see if your keyboard is operational by pressing and
holding any key.
Check for any incorrect or loose cable connections. Make sure the
latches on the connectors latch securely on to the receptor end.
Be sure you have not performed an incorrect setting on the
hardware devices in the BIOS Setup utility. A faulty setting may
cause the system to misbehave. If you are not sure of the changes you
made, try to restore all the settings to factory defaults.
Be sure all the device drivers are installed properly. For
example, without the audio driver properly installed, the speakers
and microphone will not work.
If external devices such as USB camera, scanner, printer do not
function correctly when connected to the system, it is usually the
device’s own problem. Consult the device’s manufacturer first.
Some software programs, which have not gone through rigorous
coding and testing, may cause problems during your routine use.
Consult the software vendor for problem solving.
Legacy peripheral are not plug-and-play capable. You need to
restart the system with these devices powered up and connected
first.
Be sure to go to BIOS SETUP and load DEFAULT SETTING
after BIOS re-flash.
Be sure the Quick Key Lockout Switch on the bottom of the
computer is not engaged; otherwise the quick keys will not work.
Audio Problems
No speaker output -
Software volume control is turned down in Microsoft
Sound System or is muted. Double-click the speaker icon on the
lower right corner of the taskbar to see if the speaker has been
muted or turned down all the way.
Most audio problems are software-related. If your
computer worked before, chances are software may have been set
incorrectly.
Go to [Start > Settings > Control Panel] and double-click
the Sounds and Audio Devices icon. In the Audio page, make
sure that Realtek Azalia Audio is the default playback device.
