new pc build dont fully turn on , please help

[tonschk]

Originally Posted by -Pv-

I'm unfamiliar with THAT particular motherboard, but don't panic. It looks like things might not be that bad.

Good news:
Your CPU, memory, and CGA video are working because you can see the bios post. Since this is the 1st time you started the computer, the bios wants you to at lease VISIT the bios settings so you can set the clock and visit all the screens to see all the components of your computer are working. I suspect the reboot is a timeout because you are not pressing TAB (this is unusual- you are sure it's not DEL?) soon enough. Go ahead and press the SETUP button, set the clock, visit the screens (don't touch anything you do not understand) and with the OS installation disk in your CD drive, SAVE and EXIT the bios. Your computer should detect the OS disk in the drive and start installing it.

If all the components of your computer are working, things should go smoothly after that.
-Pv-

thank you for your help , yes , i have done a mistake is not TAB , is DEL , I willtry your suggestions , but the computer is turning off very very very fast after the sentence " PRESS TAB TO SHOW POST SCREEN , DEL TO ENTER SETUP"

[ghost_666_rider]

As another stupid thought, check that your cpu cooler is plugged into the proper header. If you missed by an inch you'd be in the north bridge power socket, and this board has a default setup in bios to read the rpm of the cpu fan and not to boot if its not receiving signal.

[GlobalExplorer]

Probably you have to check all connections .. I have build dozens of computers and it has happened to me many times that ;

floppy / harddisc cable was not properly connected
graphic/sound card was not firmly in its slot
memory modules / cpu

Did you forget that your graphic card needs to be connected with a power cable? I think my brother also didnt get past the post screen because of that.

Another very nasty problem that happened to me once is that the mainboard was in contact with the case. I had forgotten to use plastic washers which produced some sort of short circuit. The computer wouldn't POST but it all went away once I had installed the mboard a second time with the washers.

Keep checking and you will finally get it running .. in most cases the hardware doesnt take damage, fortunately, but care is necessary.

[tonschk]

Originally Posted by ghost_666_rider

As another stupid thought, check that your cpu cooler is plugged into the proper header. If you missed by an inch you'd be in the north bridge power socket, and this board has a default setup in bios to read the rpm of the cpu fan and not to boot if its not receiving signal.

YES , this must be the reason , I install inside the case Coolermaster CM690 three exhaust fans (140/120mm) and three intake fans (140/120mm ) , and I dont install any fan in the Coolermaster Hyper 212 CPU cooler , thinking that the airflow was already enough with this Six 120/140mm fans , this is the reason ,thank you very very very much

[tonschk]

Thank you very much all, this forum is very helpful , thank you

[-Pv-]

Usually if the CPU fan connector is plugged into the wrong place or not at all, the MB will issue a series of beeps in addition to the startup single beep.
-Pv-

[tonschk]

Unfortunatly , the CPU ( connected/non connected) fan was not the problem ,I connect two differents fans ( 3 and 4 pins) to the CPU fan MOBO connector and the PC turn off again and again after the message ...."press tab to show post screen, delete to enter setup

the extra power connector to the video card is connected properly , all three RAMs are properly seated

[SteamWake]

Double check to see if the heat sink fan is properly seated on the cpu.

Secondly check to see if the auxillary power to the G PU cooling fan is connected.

[Bubblehead Nuke]

You do have the main power supply connector and the secondary power connector hooked up right?

Most motherboards will POST with the main connector, but due to insufficient power to the CPU will shutdown as soon as it tries to bootstrap the CPU.