Finally got all the pieces for my first system:
- ASUS M5A97 mobo
- AMD Phenom II x6 1055t 2.8ghz processor [Refurbished]
- Corsair Vengeance LP 16g (4x4GB) ddr3 1600Mhz ram
- NVidia GeForce MSI N460GTX CYCLONE 1GD5/OC gpu
- Cooler Master 600w ATX 12v psu
1. PSU works, tested on roommate's system. All power cables tested, no issues.
2. GPU works, tested on roommate's system as well, hooked up fine and video came out crystal clear.
I found that my RAM isn't compatible with my mobo [too late, unfortunately, though the ASUS mobo 'does' have the memOK feture]. So I used the tester system's ram [OCZ 2gig 1600Mhz] that 'is' compatible.
Checked and double checked 'all' power connections, tripled checked just now actually. Fans spin, lights come on. But no beeps, no POST. Just that dancing 'No Signal!' indicator on my monitor.
I'm leaning towards a faulty CPU as i 'did' get it refurbished, I plan on testing the CPU in a friend's AM3+ board tomorrow.
Was hoping to get other's opinions. I've narrowed it down as far as possible using the 'tester' system my roomie lent me. I only wish he had a AM3/3+ board.
Also noticed I did not have have any standoffs installed, took 'everything' out, installed standoffs, installed my one stick of compatible ram, cpu, psu, and gpu [no onboard video]. Still nothing. retiring it for tonight, will update tomorrow after I get the system speaker.
Breadboard with just motherboard, CPU & HSF, case speaker, and PSU.
Make sure you plug the CPU power cable in. The system will not boot without it.
I always breadboard a new build. It takes only a few minutes, and you know you are putting good parts in the case once you are finished.
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. Remember, at this time, you do not have a graphics card installed so the load on your PSU will be reduced.
If no beeps:
Check for line power at the PSU input. Extension cords, power strips, and power cords do fail.
If you have power and no beeps, suspect components in likely order are PSU, motherboard, and CPU.
Running fans and drives and motherboard LED's do not necessarily indicate a good PSU. In the absence of a single short beep, they also do not indicate that the system is booting.
At this point, you can sort of check the PSU. Try to borrow a known good PSU of around 550 - 600 watts. That will power just about any system with a single GPU. 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.
A way that might be easier is to use the main power plug. Working from the back of the plug where the wires come out, use a bare paperclip to short between the green wire and one of the neighboring black wires. That will do the same thing with an installed PSU. It is also an easy way to bypass a questionable case power switch.
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, long single beeps, or series of short beeps indicate a problem with the memory. If you get short beeps verify that the memory is in the appropriate motherboard slots.
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. At this point, if the system doesn't work, it's either the video card or an inadequate PSU. Or rarely - the motherboard's PCIe interface.
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. It's possible that you can pass the POST with a defective video card. The POST routines can only check the video interface. It cannot check the internal parts of the video card.