No Power, No POST, No Video
1. STEP:
Ensure Correct Power Button Is Used and Is Not Sticking or Broken. If the
power button remains depressed during the power-on attempt, the computer
immediately powers off, mimicking a "no power" symptom. Ensure the
button is not being held down too long or binding against the bezel or chassis.
If necessary, remove the front cover to press the button directly.
2. or
else...STEP:
Check the Power Button LED on the Front of the Computer (on Blinking yellow)
Initial state of LED at power up.
Indicates system has power, but the POWER_GOOD signal is not yet active.
If the hard drive LED is off, it is probable that the power supply needs
to be replaced.
If the hard drive LED is on, it is probable that an onboard regulator or
VRM has failed. Look at the diagnostic LEDs for further information. or lese..
3. STEP:
Restart the Computer Using the Power Button.Press and hold the power button
down until the computer powers off. This should not require more than 10 - 15
seconds.Press the power button to turn on the computer.
4. STEP:
Verify the Power Supply Voltage Selector Is Correct for the Region. Verify
the setting for the power supply:
*Unplug the power cable from the back of
the system. *Press and hold the power button for at least 5 seconds to
discharge remaining power.*Inspect the voltage selector setting on the back of
the machine (Figure 1). Ensure that the voltage select is set in
the correct position for the region the in which the system is operating: For
Europe and Asia, the voltage setting should be 230V.In North America,
Mexico, parts of Central and South America, and parts of the Caribbean, the
voltage setting should be 115V.*Plug the power cord back into the back
of the system.*Turn on the power.
STEP:
Try a Different Known-Good Wall Outlet.
STEP: Remove All External Devices. Turn the system
off.
Unplug everything from the front and
back of the system except for the power cord or AC adapter, including: keyboard
mouse monitor speakers printers scanners USB devices handheld PDAs external Zip
or CD-R drives joysticks/game pads, etc
Attempt to turn the system on.
STEP:
Check the Power Button LED on the Front of the Computer
Blinking Amber/yellow: Initial state of
LED at power up.
Indicates system has power, but the POWER_GOOD signal is not yet active.
If the hard drive LED is off, it is probable that the power supply needs
to be replaced.
If the hard drive LED is on, it is probable that an onboard regulator or
VRM has failed.
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Usually answered in minutes!
when shows the black screen when system are running
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