Looks like your power supply's failed. The green light on the back of your power supply is just a neon light that just confirms that the power lead is OK, it does not relate to the status of the power supply! Try powering it up with another power supply, or replacing the power supply.
Hi,
It sounds like you have a power supply unit failure, this unit is in the rear of the computer and it may have blown the fuse in it.
Try to hold the power switch on for 5 secs when you plug it in, if the unit still wont switch on then thats what the problem will be.
Hope this helps, let me know if you want more information.
Thanks
Jason
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I'm having the same problem with a Compaq Persario SR2150nx. I changed out the power supply, all the connections are in all the way, and the computer still won't power on. Could it be that the motherboard has died? This computer hasn't been turned on in months. I even cleaned all the dust from the CPU.
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