While the ATX 2x12 Main Power cable is connected, ATX-12V-2X4 is not found on my Power Supply (PSU).
The Gigabyte user manual is not easy to understand. Do two power connectors need to be used?
With a sixty-five watt processor, one plug should be enough...
Is that a typo, are you using a PCI graphics card, or is it actually PCIeX16?
First thing to check (carefully) is that every brass mounting standoff corresponds to a mounting hole in the MOBO - an extra one is a killer.
Power down at PSU switch
CPU and heatsink/fan (check carefully that the fan retaining pins are fully inserted, completely locked, and not cracked)
one stick of RAM, in slot closest to CPU
video card and monitor connector (if more than one PCIe slot, again, in slot closest to CPU)
all power plugs - 20+4 or 24, 2x2 or 2x4 ATX power, graphics card power
case speaker and power switch connectors
keyboard (don't need a mouse at this point)
place jumper on RST_CMOS pins
remove jumper from RST_CMOS pins
power up at PSU switch
power up by depressing case power switch
If you get video, enter BIOS with <DEL> (may need a <TAB> to get to POST screen, if 'splash' screen is enabled)
Select and execute "Load Optimized Defaults" - save and exit, reboot
reinsert other components, one at a time, testing each time after addition
The 4-pin ATX wire from the Antec PSU was connected to the Gigabyte mainboard's 2x4 ATX connector and the system did beep and pass POST. But the next problem is Windows XP setup CD generates a Stop error screen below:
A problem has been deteched and windows has been shut down to prevent damage your computer.
This is the first time you've seen this stop error screen, restart your computer. If this screen appears again, follow these steps:
Check to be sure you have adequate disk space. If a driver is identified in the stop message, disable the driver or check with the manufacturer for driver upates. Try changing video adapters.
Check with your hardware vendor for any BIOS updates. Disable BIS memory options such as caching or shadowing. If you need to use safe mode to remove or disable components, restart your computer, press F8 to select Advanced Startup options, and then select Safe Mode.
*** STOP: 0x0000007e (0xC0000005, 0xF748e0bF, 0xF78DA208, 0xF78D9F08)
*** pci.sys - Address F748e0bf base at F7487000, DateStamp 3b7d855c
There is only one PCI card attached to the mainboard which is an old ATI Radeon 9250 256mb video card.
The BIOS recognize the two SATA 2 hard drives and 2 GB RAM inside the case.
My copy of Windows XP is also old, from 2002.
What tests can be done to debug this. Which component(s) are failing? Do you think the problem is with the setup of the SATA 2 HDDs. There are two in the case. The first HDD is for the operating system and applications. The second HDD is for data only: photos, videos, documents, music, etc.