No post/beeps, power supply runs

[hyoujin]

So I am trying to figure out which component is the problem.

When i turn on the computer, everything runs - fans, gpu fan, cpu fan, lights, hard drive spins, etc. BUT there are no beeps, no post, and just a black screen.

So far what i have done:

Tested power supply (using the paper clip method, aka not attached to mobo) - fans run, hard drive spins again

Removed ram, started computer, got beeps from missing ram. Reinstalled ram and the computer started, got a login screen and logged in, then all of a sudden got a blue screen of death. <-- have repeated this method and have not succeeded

Reinstalled graphics card, which seems to be fine since the screen has shown for the method above

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I do not have another computer to test the parts individually and the computer currently just turns on with no beeps or post with everything spinning (fans, hard drive etc.)

Please help!

Thanks in advance

 

[ilysaml]

Can you place the motherboard on a non-conducting surface outside of the case along with your power supply? (Wooden table would be fine or even a stack of books if your on carpet). Use only CPU and a single memory module (this will at least minimize the possibility of other components being a problem although it is possible they are culprits as well). Connect your power supply not forgetting the 12V power connector for your CPU. Reset the CMOS jumper. Short the +/- Power pins on your motherboard's header and the machine should power on. Lets go with those results if you don't have another PSU to work with.

Nice advice here.

 

[hyoujin]

So I get the same result with 1 memory module and cpu - no post/beeps just the cpu fan running at an extremely high speed (louder than when the computer ran normal)

what does that mean?

 

[hyoujin]

also when i remove the ram module and start it up - i no longer hear beeps

 

[airsoftsoldrecn9]

Those two comments do not seem to make sense.

So I get the same result with 1 memory module and cpu - no post/beeps just the cpu fan running at an extremely high speed (louder than when the computer ran normal)

also when i remove the ram module and start it up - i no longer hear beeps

which seems to indicate that you heard beeps at some point and they are very important since the tone will actually give an indication of what is wrong.

1 long beep followed by 2 short beeps indicate display or video error

There are certain beep codes that are tied to the BIOS type:
I would think you would have an AMI/AWARD BIOS:

http://www.computerhope.com/beep.htm

Under what conditions does the machine beep? I assume you removed the board from your case and removed all other components is this correct?

Looking back at your first post you removed a module and re-seated it and the machine booted. This seems to indicate something is wrong with your memory.

How many memory modules do you have?

 

[hyoujin]

to be clear about the previous comments that didn't "seem" to make sense:

the first comment is in reference to 1 module of ram, cpu, and mobo only connected to the psu - result: it operates the cpu fan with no beeps, no post

second comment is in reference to when i reassembled all the pieces (everything connected) and REMOVED ALL ram modules, I no longer got any beeps (which originally when i removed all ram modules i would keep consecutive short beeps)

I have 4 ram modules

the removing of the ram module, hearing the beeps, re-seating the ram modules, running the computer was a 1 time thing.. I then got the blue screen and have not been able to start it up again.

once again: I DO NOT hear anymore beeps whether i have the ram modules installed or not <-- this is the current situation


ALSO the beeps were same length beeps (short) and repeated that seemed to continue for a long time - not one long and 2 short..

 

[hyoujin]

that site was helpful.. but since i no longer can hear the beeps i am unable to count how many beeps there are BUT

i just want to know if this is the case so far, is it safe to say it is not a power supply or gpu problem? or there is still that possibility?

 

[hyoujin]

would resetting the CMOS have anything to do with me no longer hearing the beeps?

 

[airsoftsoldrecn9]

It makes no sense to try diagnostics without any memory modules. When you remove all of the memory modules the machine is powering on but can not execute the POST fully without memory. This is why there are no beep codes (the short beeps are probably an indicator that certain hardware can not initialized). This would by synonymous to attempting to test your monitor without the display cable attached to your display port.

resetting the CMOS can possibly erase stored faults but hardware is tested every time the machine is powered on and is put through the POST state.

You have four memory modules so test each one of them individually in DIMM1 of your motherboard. Then just as a check to make sure that dimm slot is not faulty move to a different slot and test them all. You could effectively do this with each slot if you wish and will pretty much confirm a memory issue or something else.

the board is out of your case correct (the reasoning behind this is to eliminate any possibility of short circuit; I have seen this happen, even after months of a computer working fine because the owner did not properly screw down a standoff)?

lets narrow down this problem first before moving on to something else.

 

[hyoujin]

it does make sense.. because if its beeping without memory modules then that part of the mobo is working fine.. its a process of elimination

 

[hyoujin]

and i doubt the standoffs would be an issue.. the computer was running and then made a beep noise and shutdown.. that doesn't sound like a standoff issue

 

[airsoftsoldrecn9]

ok you can not test the machine without memory or a cpu installed period (the test without memory modules does not mean anything). Those are the bare minimums of course along with the motherboard your testing and a power supply properly connected. There are too many things going on behind the scenes (at a hardware level) during a power on and boot sequence so honestly I do not know if there is an FPGA or small controller that does the POST test.

the point of troubleshooting is removing as many erroneous factors as possible so that something is not misdiagnosed so removing the motherboard eliminates one of those factors. If you want to ignore it fine but remember that is something you have not, with certainty, taken out of the equation.

did you try each memory module in at least 2 different dimm slots? what are your results?

 

[hyoujin]

I have removed the mobo from the case.. installed ram in various slots and got same result.. loud cpu fan noise with no beeps/post (only 1 module of ram installed, cpu, and mobo with powersupply, powersupply is connected properly to mobo)

 

[hyoujin]

thanks for the suggestion, problem is i have to find someone with a PSU

bestbuy demanded a $199 diagnostic fee
another store said $60

for that price i can buy an entire new PSU + more..

wish people were more nice and would just help out by letting me try a diff PSU or at least test my PSU

 

[airsoftsoldrecn9]

do you have the model number for the motherboard?