boot issue

[johngav]

Hello everyone
All of the sudden I tried to hard boot my desktop it powers on for three secs and then powers off. I get no mobo beeps at all. The external usb disks both have lid leds which means they do get power. I tried rearanging the cables but no avail.

Any help appreciated

Thanks in advance

[rjfvillarosa]

First try removing all external devices except keyboard, monitor and mouse and see if it will boot up. If that fails try a minimum hardware boot using the instructions in this link for a new build that won't boot. The idea is to try and see what is stopping your machine from booting.

PROBLEMS with a NEW BUILD? Try This!!

[Rick Hall]

Make sure that your monitor and graphics card are working. You can try the monitor on another computer and you can try the graphics card with another monitor. If you are not getting graphics then your PC will shut down and 3 seconds sounds just about right for the graphics to come online. The first thing you can check is that your connections for the monitor are good.