Power blue light flashing when i turn the computer on

SOURCE: My computer starts up, but

Several different hardware failures can cause this type of issue. The first step that should be taken is to verify that there are no lose or disconnected wires coming from or going to the computer. If when starting the PC your getting no power than there is an issue with the power supply. If you are getting power to the PC than you should listen for the beep code on start up. 1 beep after starting the computer signifys that the power on self test (Also known as the POST) has completed with out issue. When getting any other type of beep code you should research the meaning of the code. Beep codes differ from company to company. The best way to identify the meaning of a beep code is to type the manufacture, model and number of beeps into Google. Another possible issue is that your hard drive is corrupt. If this is the case than your computer will pass the power on self test(POST) but will have a message like MBR not found or one of many other errors. If you are getting an error than it is also a good idea to research the error to determine the proper fix. If the PC seems to boot correctly but there is no image on the screen than the issue may be a result of a bad video card. In that case the video card will need to be replaced.

Based on the way you described the issue I would say that it is most likely the power supply that has gone bad. This issue is very common and for most computer a new power supply will only run you about $20-$30.

I hope that information above has helped is some way.
If possible please rate this solution.

SOURCE: computer powers up, but monitor shows a self test

Check the cables first, reset the monitor to factory settings. Check also your video card

SOURCE: gateway computer does not turn on

Without seeing the machine, I'm thinking you have a motherboard problem. But try these troubleshooting steps before throwing in the towell:
Open the case and disconnect the CD cable. Now try it. If it still doesn't work, disconnect the hard drive and try it.
Let me know what happens. I've seen CDs mess up a system like this. I many times will swap out the power supply, but I'm thinking with the lights flashing, its a more serious problem.

SOURCE: slow flashing blue power lite. Monitor shows no

First when you power up the computer press F8 key then enter in enable vga mode.
If you are able to enter then go to start menu->control panel->display property ->settings.
Change screen resolution to 1024*768 then apply and ok.
But if you are not able to see safe mode and other menu.
Then open cpu cabinet .
Refix RAM memory.
Pull cmos cell from motherboard for 10 minutes.
Reattach all connection harddrive.
Open processor fan and processor remove dust from all parts.
Make sure motherboard is not ground with cabinet.
Remove PCI cards if any.
After all above still same then change RAM then try.
Let me know if you need further assistance.
Thanks for using FixYa.

SOURCE: when i turn the computer on, it turns on but the

Could be a bad power supply in the computer. Most power supplies are pretty cheap these days. Open up the PC and see which version you need. Most lekely an ATX. Good Luck!