new computer starts but monitor/mouse/keyboard dont work

[Belmont]

Originally posted by: mechBgon
Troubleshooting starter

1. Overview of the problem
   Just finished building my new computer and it turns on but my monitor says no signal.
   
   
2. Full description of the problem and symptoms
   Basically everything on the computer starts up though my keyboard, mouse, and monitor arent turning on or detecting a signal. Also I have to turn off the computer by the PSU switch, and when i switch the psu back on the computer turns on automatically.
   
   
   
   
3. Did it work normally at one time, or has the problem always existed?
   just built it
   
   
   
4. Is the problem consistent and repeatable, or entirely random, or semi-random?
   keeps happening
   
   
5. I already tried these steps:
   I've tried all 4 DVI outputs on my video card, turned it off and on.
   
   
   
6. My software:
   • fresh HDD
   • N/A
   • N/A
   
   
   
7. My hardware
   • Custom.
     
   • Asus M4A79D
   • AMD Phemon II 955
   • Sapphire 4850x2
   • OCZ 1066 4gb 2 stick
   • Seventeam 750w
   • HP 2159m monitor, seagate barracuda 500gb SATA HDD
   
   
8. Other information that might be relevant
   ._.
   

 

[Belmont]

one more thing. I individually tested each piece, and when I put in my graphics card my computer automatically started when I flipped on the PSU ( had the monitor plugged into it)

I tried the video card in a different PCI slot and the computer doesn't auto start when given power now.

I have stripped it down and started it bare bone with each piece, and it doesn't beep at all...

I tried removing the battery from the mobo and resetting the cmos and that didn't work. checked voltage settings on psu (doesn't have a switch). I also disconnected everything from the system panel but the reset and on switch. also I dont know if i mentioned this earlier but to turn it off I must unplug it.

Also it stopped starting automatically when i turn on the power.

 

[Belmont]

hahaha. ok help me with this one. I took out the mobo and hooked everything up on a cardboard box now it boots properly....... what should I do?

 

[mpilchfamily]

Check the case and make sure none of the standoffs are in the wrong place. Don't know what case you have but most all motherboard trays have more holes then an ATX motherboard need. This way they can acomidate mATX and EATX boards. If a standoff is in a place that doesn't line up with the motherboard mounting holes then its shorting the system.