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Re: pc wont turn on
Do you read something at your monitor when pc starts?
can you open Bios setup pressing DEL ?
If you dont see anything on the screen perhaps there is faulty graphics card or display monitor.
do you hear any beep-beep when push power on?
observe and describe what happens when pc starts.
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Which light flashes? If it is the battery light then perhaps your battery is empty?
When plugged into your PSU does the power light turn on? If not your PSU may have broken or the plugs fuse may have blown.
Other potential causes could be your RAM, CPU or even your system board. Check the RAM is correctly seated, if two modules are installed try removing one.
Hope this helps,
your getting power to your PSU, via the green light on your mobo.
verify the PSU has a green light(most emachines do)
it sort of sounds stupid but, check the connection of the cable coming from the front of the case(the wires that connect to the mobo to the power button on the outside of the case.
if all else fails, take the pc out of the case.. put all components on a static free bag and start to rebuild your PC(without a case)
...this will rule out a short on the PC case, and faulty wiring from the case...
pretty much sounds like you've been through almost every step except replacing the PSU(you just said you tested/but your getting power to the PSU)
you need to replace the power supply. The fan sound is the fan for the power supply and not the computer. for cheap parts or used goto headgap's. They know what you need and probably even help you replace it yourself.
Try a few things for me OK? From what you typed, turned on the psu "the toggle switch on the psu", pc seemed to be starting up. I need you to keep the toggle switch on the power supply in the on position. Press and hold the start button on the PC case to shut it down. Give it a few seconds & power up by pressing the power switch on the case. Notice a differance? Next, unplug everything connected to the pc expect the monitor, mouse & keyboard. Try to boot. Still no? Remove the side of the case exposing the board. Turn the psu off by flipping the toggle switch on the psu, wait till the green light on the board goes out. Grab the Mb ( I know it's tight in there) and see if you can move the board in any direction. Not loose? Re-check all data & power connections for a solid connect. Re-check your case to Mb connections. Also check the PSU, there is a red slide switch it should be set to 115v. Post your findings..
unplug everything that isn't necessary to run the laptop ie, external mouse, battery, etc.
Then plug the ac adapter in, making sure the switch for 110/220 is appropriate for your region.
Now, does the machine turn on?
PLease respond with the answer, and we'll go from there.