The green lights on a Sharp television indicate a problem. The number of blinks is a code. The television has gone into a coma in order to protect itself. You can force this television on by doing this. Unplug the television. Hold down the vol+ and channel down button on the television and while holding them down still plug the television in. This is a temporary way to view the television but the problem will get worse if not repaired. Should the television power on this way unplug it when you want to turn it off without pressing the power button at all.
When
you plug in the power cord is there any lights whatsoever on the computer?
When you press the power button do you hear fans running, hard drive spinning,
lights on the computer, hear any beeps or lights constantly blinking, hear the
DvD/CD drive click and the light on the drawer of the DvD/CD turn on for a
second or two? If so the laptop is trying to boot or may have booted, but
the screen is not showing for some reason.
Beep tones and blinking lights tells the technicians what is going on with the computer
and why it is not booting. Most times it's a motherboard issue when you
hear beeps or blinking lights continuous. Most times the problem is with
the memory or Video Card. Count the Blinking Lights or Beeps and take note of
their pattern (1 Long or 1 Long followed by 2 Short).
Maybe your power cord is bad if you don't get anything to happen whatsoever
when you press the power button.
Maybe
you have a Static Charge Buildup. Remove the Power Cord, then Press and
Hold the power button for 30 seconds. After 30 seconds plug the power
cord back in and hit the power button to see if it boots.
Maybe
your memory is bad or the memory slot is bad.
Remove
the Power Cord, Open the Case and remove one of the memory chips. Set the
chip aside then try rebooting the computer. If it boots, then you know
the memory chip you set aside is bad so mark an x on it with an ink pen.
If it fails to boot then move the chip to the next memory slot and try
rebooting. If it fails take the chip out and set it aside, then put the
other chip in and try booting it in both slots. If it boots, just to
verify that the chip set aside is bad, mark an x on it and put it into the open
memory chip slot and try booting.
Maybe
your power supply is bad. Sometimes there is enough power to make the
power light or some other lights come on but not enough power to make the fan
turn on or hard drive spin.
Below are links and info I found from Dell's Website based on your model.
http://support.dell.com/support/edocs/systems/dime521/en/SM_EN/specs.htm
Controls and Lights
Front of computer:
Power button - push button
Power light
green light - Blinking green in sleep state; solid green for power-on state.
amber light - Blinking amber indicates a problem with the power
supply inside the computer. If the system cannot boot and there is a
solid amber light, this indicates a problem with the system board (see
"Power Problems" in your Owner's Manual).
Diagnostic lights
four lights on the front panel (see Diagnostic Lights.)
Standby power light
AUX_PWR_LED on the system board
Hard-drive activity light
green light - When the computer is reading data from or writing data to the hard drive.
LAN indicator light
green light - Solid green indicates that a LAN (local area network) connection is established.
http://support.dell.com/support/edocs/systems/dime521/en/SM_EN/adtshoot.htm#wp1056411
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