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Nothing works

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January 14, 2011 7:33:51 PM

I built my first comp and nothing works . everything is at it should be. What the hell. Any suggestions. This is what I have


MB GIGABYTE[GA-880GA-UD3H R

PSU SEASONIC [S211 520 BRONZE RT

CPU AMD[PH II X6 1055T 2.8G AM3 RT

MEM 4Gx2[GSKILL F3-12800CL9D-8GBRL

HD 1T[SAMSUNG HD103SJ 32M 7K%

DVD BRN ASUS[DRW-24B1ST/BLK/B/AS%

More about : works

January 14, 2011 7:43:19 PM

Check the connectors that connect the power button, reset button, power led, and HDD led. Double check with the manual that they are all in the correct place.

Any lights turn on (on the motherboard) when connect the power cord to the PSU?

Is the 8 pin CPU Power connector plugged in?
a c 122 B Homebuilt system
January 16, 2011 4:06:50 PM

Use this to make sure your didn't leave anything obvious undone:
Build it yourself:
http://www.tomshardware.co.uk/forum/274745-13-step-step...

Work systematically through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-postin...
I mean work through, not just read over it. We spent a lot of time on this. It should find most of the problems.

If not, continue.

I have tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may be different, but they all use a single short beep for a successful POST.

Breadboard - that will help isolate any kind of case problem you might have.
http://www.tomshardware.com/forum/262730-31-breadboardi...

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:
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.

You can turn on the PSU by completely disconnecting the PSU and using a paperclip or jumper wire to short the green wire to one of the neighboring black wires.
http://www.youtube.com/watch?v=5FWXgQSokF4&feature=yout...

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.
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a b B Homebuilt system
January 16, 2011 4:12:57 PM

"Nothing works"....

As descriptive and detailed as that is, a few simple details such as:

Powers up/fans spins, one beep from mb, but no video

Does not even begin to power on....(no fans, nothing!)

Powers on, but instantly shuts back off....

See how those sorts of details might be semi-helpful? :) 
a b B Homebuilt system
January 19, 2011 6:53:14 PM

mdd1963 said:
"Nothing works"....

As descriptive and detailed as that is, a few simple details such as:

Powers up/fans spins, one beep from mb, but no video

Does not even begin to power on....(no fans, nothing!)

Powers on, but instantly shuts back off....

See how those sorts of details might be semi-helpful? :) 



I'm a big fan of thousand dollar paper weight, but it's not very descriptive of issues with the computer either :) 
!