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I am in need of some enlightenment, Booting problems

Last response: in Motherboards
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December 22, 2011 8:16:59 AM

Hello,
I am going to start from the beginning, so the text might be a bit longer, sorry for inconvenience

Recently I moved from one place to another, but I had very small car, so I basically packed my computer to a cardboard box and threw out the case. (It might be irrelevant, but I also removed motherboard battery for the duration of the journey)

On my new place, I installed it into an old case. Now the problem is that It doesn't want to start at all.
Hard drive doesn't even start spinning, nor the CPU or the Video card.

Not even power nor HDD leds. However the lighting on my motherboard still seems to be working. I cant do POST since I don't have a speaker. I have tried reseting BIOS, using a second PSU. The wiring seems to be ok(4pin cpu-, gpu-, main 24pin-, hdd wire).

My motherboard seems to be quite dead due to the transportation.
I am just asking if I have maybe missed something or is there anything else I can do.
Also my other guess is that the problems might be related to my CPU, would there be any way to check that?

One more thing, does it seem to matter if my motherboard is locked with 3 screws instead of 6?


Thank You in Advance


a b Ĉ ASUS
a c 328 V Motherboard
December 22, 2011 8:31:39 AM

The switch on the back of the PSU must be on, is it?

4/8 pin plugged in?

20/24 pin plugged in?

Is the battery back in the mobo correctly installed?
a b Ĉ ASUS
a c 328 V Motherboard
December 22, 2011 8:33:46 AM

Is the power cable in the powered AC outlet? Verify that.
Related resources
a b Ĉ ASUS
a c 156 V Motherboard
December 22, 2011 8:41:01 AM

If your system is not working, you are going to need a system (case) speaker.

The following is our "build it yourself" thread. Review it. Maybe you overlooked something simple.
http://www.tomshardware.co.uk/forum/274745-13-step-step...

If not, continue.
The following is an expansion of my troubleshooting tips in the breadboarding link in the "Cannot boot" thread.

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:

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.

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.
December 22, 2011 9:45:52 AM

Oh god.. just loaned a case from my friend.. installed it. It turns out that my power switch was broken in my old case. Man, never even thought that something so simple can break.

Thank You for Your answers, sorry to have wasted Your time
!