Problem with Tower Build

[kingcatto]

I recently ordered parts to build myself a tower. While its been a couple years since I've done so, its something I have done in the past, mostly back in college. As a result, I kinda know what I'm doing, but I'm sure I'm rusty.

The problem I'm having is when the tower is setup and I turn power on, everything turns on (fans, lights, etc) but after 3-4 seconds, everything goes off. I've tried just using the mobo/psu/cpu and the same problem happens. Unfortunetly I dont have an extra mobo, cpu, nor psu to simplify testing.

Any advice, ideas on what the problem could be, etc., would be mostly greatly appreciated. Thanks!

My parts are the following:

Case: CODEGEN L-6206-CAC9-38C2 Black/Silver Steel ATX Mid Tower Computer Case 350W Power Supply - Retail

Mobo: GIGABYTE GA-8I848P-G Socket 478 Intel 848P ATX Intel Motherboard - Retail

Gfx: SAPPHIRE ATLANTIS RADEON 9800PRO Radeon 9800PRO 256MB DDR AGP 4X/8X Video Card - Retail

CPU: intel Pentium 4 3.0E Prescott 800MHz FSB Socket 478 Processor Model BX80546PG3000E - Retail

RAM: crucial 512MB 184-Pin DDR SDRAM DDR 400 (PC 3200) Unbuffered System Memory Model CT6464Z40B.8T - OEM

 

[UsandThem]

Do you have all your power connections plugged in (12v and 20 pin power connector)?

Try reseating your heatsink/fan, and make sure it is plugged in.

Sounds like your system might be shutting down because of heat. Socket 478 Prescott's run very hot.

 

[Zepper]

Try clearing your CMOS exactly accorting to the mobo manual's instructions. And make sure the HSF on the CPU is seated properly and that the HSF is connected to the CPUFan header (specifically marked that way). The fan on your CPU must be a 3 wire type with working speed sensor (some fans may turn too slow to be detected - not detected, system shuts down. Sometimes a BIOS update will resolve the slow fan detection problem - it did with one of my mobos.

.bh.

 

[sniperruff]

see if anything is shorting out on the case, and if the HSF is properly seated. you didn't remove the thermal pad and forgot to put some arctic silver back on, right?

 

[Arcanedeath]

I'd guess you have a short somewhere, I'd take the system out of the case and place the motherboard on it's anti static bag, then w/ just 1 stick of ram, the CPU + HSF, and the video card try and get it to post outside the case and report back.

 

[kingcatto]

Ok thanks for all the feedback thus far. Here goes:

Originally posted by: UsandThem
Do you have all your power connections plugged in (12v and 20 pin power connector)?

Try reseating your heatsink/fan, and make sure it is plugged in.

Sounds like your system might be shutting down because of heat. Socket 478 Prescott's run very hot.

Triple-checked that, no success.

Originally posted by: Zepper
Try clearing your CMOS exactly accorting to the mobo manual's instructions. And make sure the HSF on the CPU is seated properly and that the HSF is connected to the CPUFan header (specifically marked that way).

Tried clearing and didnt help. The CPU/HS/HSF is all setup correctly, fan goes on when there is power for the 3-4 secons as well.

Originally posted by: sniperruff
you didn't remove the thermal pad and forgot to put some arctic silver back on, right?

nah thermal stuff still at the CPU/HS connection.

Originally posted by: Arcanedeath
I'd guess you have a short somewhere, I'd take the system out of the case and place the motherboard on it's anti static bag, then w/ just 1 stick of ram, the CPU + HSF, and the video card try and get it to post outside the case and report back.

Tried this, but it continues to do the same thing, even outside the case on the anti-static bag.

Any more ideas?