Hello, My name is Tim and I will assist you in finding an answer to your question.
Remove the battery and the power adapter and press the power button down for about 45 seconds and then release it. Then plug just the power adapter in and press the power button to see if it comes on
Sorry I thought it was a laptop
Can you remove the side of the case to reveal the motherboard and see if it has a lit LED?
Are you sure it is not in the hibernate mode
Unplug the power cord and press the power button in for about 45 seconds and release it. Then plug the power cord back in and see if it will turn on
OK unplug your video card off the motherboard and try turning it on again
Ok is your power supply a swiching power supply? If so check the back of it where the little switch is and make sure it is set to 115V instead of 230V
Does it have an on/off switch on the back of it
It should have a voltage selector on the back of it that is small and red that slides to the left or right to switch voltages
ok just needed to make sure it is set to 115v
put the video card back in and remove the heatsink and fan and the processor press the power button to see if the computer will power up
It covers the processor to keep it from getting too hot
just make sure the power cord is unplugged from it
Also make sure you do not bend any pins on the processor when removing it from the slot
Did you remove the processor also?
Do you see a lit LED on the motherboard?
The processor is the brains of the computer but I need to make sure that it is not causing the power board not to come on
Can you remove it easily
OK do not worry about it
Put the fan and heatsink back on and plug the power cord back in
While looking at the motherboard make sure the little cables for the front panel are plugged in good
Ok try turning it on again but this time hold the power button in
Are you sure that the on'off switch didn't go bad
Just have to check
The only way to check is to shot the pins that the power switch connect to but I do not know if it is safe or not
Let's bypass that
I think the best thing to do even though the NIC light is flashing is to swap out the power supply to see if the computer will turn on. If it does then you know the power supply is bad. If it still doesn't then your motherboard needs to be replaced
You need to try a different power supply because I believe either the power supply is faulty or the motherboard is bad