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Your power supply wattage is below the requirement. you did not specify what is the wattage of your power supply. if that is 300watts you can increase defending on your load. if this will help you then i'm hoping a positive response
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Remove the power cord, remove the case and look inside the computer at the capacitors. See if any of them are busted or leaking corrosion. The capacitors look like little battery towers but they are not as tall as AA or AAA batteries.
Lamp is burned out or makes a popping sound. When the lamp reaches its end of life, it may burn out and may make a loud popping sound. If this occurs, the projector does not turn back on. To replace the lamp, see on page 38. LAMP light is solid amber If the LAMP light is solid amber, replace the lamp. LAMP light is blinking amber If the LAMP light and the Power light are blinking amber, the lamp driver has failed and the projector will automatically shut down. If the LAMP light is blinking amber and Power light is solid blue, the color wheel has failed and the projector will automatically shut down. Unplug the power cord after 3minutes then turn the display on again. If this problem persists, contact Dell™. TEMP light is solid amber The projector has overheated. The display automatically shuts down. Turn the display on again after the projector cools down. If the problem persists, contact Dell™. TEMP light is blinking amber A projector fan has failed and the projector will automatically shut down. If the problem persists, contact Dell™.
Could be loose battery pack. A bad memory chip would do this as well. Sounds like your not getting power.
Try this,
Unplug it, remove battery, wait couple minutes, press and hold the power button for 5 full long seconds, wait couple minutes more, then put battery back in securely, then plug in, turn back on.
Most laptops that I have worked on that power off that quickly turned out to be an overheating problem. Is the cooling fan running for the brief period that you can hear the hard drive before it powers off ? If the fan is running another potential resolution might be to remove the processor and apply new thermal paste.
I had this exact same thing happen. I tried everything I could think of and find out to try. For me it was a motherboard failure and installing a new one worked. .
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