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Your color wheel is clapped out. The
part is not directly replaceable - they seal it in the light engine and
won't sell spares. A rebuilt engine for this set will probably run you
between 230 and 270 USD. Replacing it is a cinch if you can get another
engine for it.
Try removing your battery pack. Then connect the power adaptor (even without the battery) and connect is directly to the power outlet. If it powers up, then the battery pack might be defective or totally drained.
If the battery is just totally drained, simply place the battery to the laptop. Do not turn the laptop on. Plug the power adaptor to the laptop and plug it to the power source. If you see that the charging LED is blinking in your laptop, then just leave it charging up to 5 to 8 hours.
Never use a laptop on battery mode while it is plugged in to a power source. This is the number 1 reason why laptop batteries don't last longer.
Are you sure it doesn't turn yellow then blink red?
Yellow light and off: Power supply and board might have been overheated, pulling the gpu and cpu off the main board.
Red blinking light, board is overheated and the gpu and cpu has pulled from the board.
Both are easy fixes for a professional and should cost you no more then 100 for power supply and fix or 50 for the fix. That's what I charge. Anyone who charges more is ripping you off. It is even better if you can try this yourself, but reheating the board yourself is dangerous if is done wrong and can leave you with an incapacitated Playstation.
Try to connect the AC adaptor of your laptop and plug it to the wall outlet and let it charge for 3 hours or more. When you plug it on the wall socket, it won't show the laptop's led blinking since it was totally drained. But after 3 minutes or more, it will start to show the blinking led to indicate charging. When blinking stops led light disappears, it is fully charged and ready to use.
Remember: Do not use your laptop while it is plugged in to save your battery life. When at home, remove the battery while it is fully charged and plug the AC adaptor directly to the wall outlet. It will still work without the battery as long as it is plugged directly to the wall socket.
If the blinking light on a Dell is yellow or amber or orange (somewhere in that color range) and continues to blink the entire time it is plugged into AC power (wall outlet) and when you unplug it from the wall the laptop immediately dies .... then you battery is dead and needs replaced.
If the blinking light stops after a while (perhaps a minute?) and then turns green while plugged into AC power, then it is successfully charging - or so it thinks.
When you unplug it from the wall, does it stay up and running? If it runs, it's OK - just ignore the light and plan on getting a new battery one day, start browsing now. :) If it dies immediately upon unplugging, then your battery is dead and needs replaced.
the steady red light showing when in charger shows that
it is charging. the blinking red light when taken out of
charger or turned on and off means it is not fully charged.
leave it in charger till red light turns green.