Computer Boots on but Display Monitor displays a black screen. Please help!!!!?

Question

The computer is a custom built

Soyo Dragon Lite Mobo
AMD XP 2000+
512mb pc2700 ram
6gb hdd
nvidia mx440 64mb agp x8
450w psu

I have tried everything including:

Checking connections
resetting cmos
swap ram and ram positions
swap videocards
swap power supply
swap motherboard
swap case
ran outside of case
with or without connection to hdd
swap monitors and computers

PLEASE ADVISE possible solutions that I have not tried yet.

Thanks

Answer 1

What you've done so far is pretty extensive and I can't add more suggestions other than what I stated below.

I've never had no video problems with any of my computer builds, but I did have an issue where my IWILL KA266R motherboard froze on boot without any posts on screen. I could not find what the problem was so I went out and bought a diagnostic card that output the BIOS post on LEDs to find out where it was hanging at. I can't remember what my problem was, but I did fix it using the diagnostic card. They run for about $20 to $200, and good to have for future builds.

This is the one I bought about 4 years ago from a different vendor, not amazon.com
http://www.amazon.com/Soyo-Computer-Inc-SY-TECHAID-Debug/dp/B000234U3I

A very cheap version of a diagnostic card.
http://www.newegg.com/Product/Product.aspx?Item=N82E16815158065

There are a lot more to choose from, the prices can go higher than $200 for really extensive testing cards, which is really not what you need.

Answer 2

Try another monitor that you know works the fuse in the cable that runs from your vid card to the monitor may have blown

Answer 3

oh black screen.
i saw it severally .
turn off your computer and monitor
after time , turn on your computer and after 2 min turn on your monitor. good luck

Answer 4

check the cable where it turns into computer if its loose your monitor wont work