Patriot G Series ‘Sector 5’ Edition 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333
NZXT GAMMA Classic Series GAMA-001BK Black Steel ATX Mid Tower Computer Case
Seagate Barracuda 7200.12 ST3500418AS 500GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive
LITE-ON CD/DVD Burner - Bulk Black SATA Model iHAS124-04
1 Verified all internal and external connections.
2 Monitor works when connected to my laptop, plugged into same outlet/power strip.
3 No issues with mobo standoffs.
4 Reseated GPU and RAM.
5 Removed GPU, reset CMOS, attached to onboard.
6 Tried all possible combinations of RAM.
7 Verified CPU integrity/seating.
8 No dropped screws hiding behind mobo.
9 To my knowledge, no static discharge-related damage occurred during assembly.
The breadboarding thread has a paragraph about how to build and test a PC in stages.
Breadboard with just motherboard, CPU & HSF, case speaker, and PSU. You do have a case speaker installed, right? If not, you really, really need one. If your case or motherboard didn't come with a system speaker, you can buy one here: http://www.cwc-group.com/casp.html
Without a case speaker, all you can do is to start randomly replacing parts.
You can turn on the PC by momentarily shorting the two pins that the case power switch goes to.
You should hear a series of long, single beeps indicating memory problems.
Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU.
If no beeps:
At this point, you can sort of check the PSU. Try to borrow a known good PSU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.
The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.
This checks the PSU under no load conditions, so it is not completely reliable. But if
it can not pass this, it is dead. Then repeat the checks with the PSU plugged into the computer to put a load on the PSU.
If the system beeps:
If it looks like the PSU is good, install a memory stick. Boot. Beep pattern should change to one long and several short beeps indicating a missing graphics card. Silence or long single beeps indicate a problem with the memory.
Insert the video card and connect any necessary PCIe power connectors. Boot. At this point, the system should POST successfully (a single short beep). Notice that you do not need keyboard, mouse, monitor, or drives to successfully POST.
Now start connecting the rest of the devices starting with the monitor, then keyboard and mouse, then the rest of the devices, testing after each step.
See? Most of the troubleshooting is tied to the case speaker.
Pay close attention to #2 in that checklist that jsc linked. A common mistake is missing the 4/8 CPU power. Your motherboard has a 4 pin CPU port near the back panel mouse/keyboard ports. Your PSU needs to be connected to that port.