built a computer nothing comes up on the screen

i have one ram stick i dont know if its enough but i still havent programmed the mother board it turns on but nothing on the output

First, check this thread. If any more problems arise please feel free to come back here.

http://www.computerforum.com/209946-tech-guide-diagnosing-pc-will-not-post-start.html

Best of luck!

Please stop saying 'I haven't programmed the motherboard'. You don't 'program a motherboard', unless you write the firmware code yourself. The default BIOS settings will boot the system. And certainly with the threads you've been making you really have no idea what you're doing.

So please, highlight out the parts you have and the steps you've done to this point. Making excessive threads about trying to boot the computer with no CPU or RAM really just means you're both over your head and have done a total of zero useful research.

From your other thread, did you install the heatsink? Your last thread you couldn't "get it to work".

Do you have the following items installed correctly?
power supply unit
motherboard
appropriate processor for motherboard
heatsink for processor
appropriate RAM for motherboard
a GPU
a hard drive

If you don't have these items it's not going to work