Help! New build. Only BEEP after BEEP

[alexruiz]

I just finished building my new machine after the children took over the old one. Unfortunately, the new build is not working. I powered it once with the motherboard not attached to the case, and only CPU and RAM inserted... it worked fine. I could see display.

After that I attached the motherboard to the case, and after connecting everthing I only get long repeated beeps. I disconnected everything and left again only CPU and RAM, and still the same. I took out the RAM and still long repeated beeps. I reinserted the RAM and took out the CPU and no beeps, but no display obviously. Reinserting the CPU got the same result of repeated long beeps.

I checked some beep codes, and it seems that long repeated beeps is RAM for AWARD Bios. I reinserted the RAM properly and still just beeps. Could it be the CPU? The motherboard? Or just the RAM?

Just in case, and I am not sure, but it might be possible that I connected a wrong connector to the aTX 12 V for the cPU (4 pins) The power supply is an ultra V 500W, it has has an 8 pins connector, and a 6 pins that looks similar. It doesn't have a 4 pins for the CPU. One of those should be PCI express, but the curious thing is that GND and 12 V are reversed between them. I am pretty sure I inserted the right one (yellow closer to the retention tab, the 8 pins) but I was so excited to power it up that I might have inserted the wrong one and not realizing it until it didn't power up. idisconnected everything after the first failure, so I am not fully sure I screwed up that one. What could be fried if that was the case?

Thanks as usual, this community has saved by sorry behind several times and I hope this time wil be no diferent.

 

[alexruiz]

Update:

Still beeping. The more that I look at those connectors the more I think I made the mistake on the 12 volts line after I attached the motherboard
So, I think that I indeed fried something, I just don't know what yet.....

Moral of the story: always pay attention to those connectors. At best, a $50 dollars mistake.... at worst, a few hundreds

Edit: I also noticed that the power LED remains ON after tirning OFF the system (press and hold power button for 4 seconds) Is this normal behavior?

 

[Modular]

Originally posted by: alexruiz

The power supply is an ultra V 500W, it has has an 8 pins connector, and a 6 pins that looks similar. It doesn't have a 4 pins for the CPU.

Yes it does. I have the same power supply. The 8-pin connector "breaks" apart into 2 4-pin ones.

Originally posted by: alexruiz
One of those should be PCI express, but the curious thing is that GND and 12 V are reversed between them.

The 6-pin connector is the PCI-e connector.

Originally posted by: alexruiz
I am pretty sure I inserted the right one (yellow closer to the retention tab, the 8 pins) but I was so excited to power it up that I might have inserted the wrong one and not realizing it until it didn't power up. idisconnected everything after the first failure, so I am not fully sure I screwed up that one. What could be fried if that was the case?

Well, there's the problem there. I guess this one might have to be chalked up to "lesson learned" unfortunately. I'm going to guess that at best you only fried the MOBO. The CPU is likely done for too though.

That 4-pin connector is the direct feed for the PWM on the motherboard that also feeds the processor itself. By reversing the polarity you fried the components.

I would think you could try to RMA the MOBO and CPU and see what they say. Be sure to read the directions that came with your PSU. I'm sure that they show you that the 8-pin connector breaks apart into dual 4-pinners.

Remember, the #1 rule for PC building is to take your time and triple check everything. Sorry you had to learn the hard way.