Upgraded, now no display but USB ports get power?

Mikemcd · Jan 2, 2014

I realize there are a million of these threads, but I have read through them and so far none of the fixes work.

My specs as of NOW are:

AMD FX-6100 3.8 GHz Hexacore
Radeon HD 7750 2GB GDDR3
ASUS M5A78L-MLX
Corsair CX500 500w PSU

The new parts are the CPU & GPU. As of now, I get no display BUT I get USB power, all the fans get power, but when I open the CD drive it opens for about 3 seconds and then closes automatically. I am afraid that maybe the motherboard got fried as I was changing in the CPU, but this also happened when I built my PC originally a year ago. I was too stupid to figure it out for myself and sent it to someone, but do any of you know what this could be?

elgranchuchu · Jan 2, 2014

the PSU is not giving enough power to start the computer properly, you have to change your PSU too

Mikemcd · Jan 2, 2014

elgranchuchu :

I would think that this 500 watt power supply would be sufficient enough?

jayambroziak · Jan 2, 2014

Mikemcd :

Your PSU is more than enough power. If you are getting power to all of the fans and USB ports, it almost sounds like your CPU is not nested correctly in the socket. I had a friend build a computer and he didn't have the CPU properly inserted into the socket and his computer would power up, but not do anything else. If this doesn't resolve the problem, try to reset the CMOS on the motherboard.

Also, did you upgrade the motherboard BIOS before putting the CPU in? Older boards need to be able to recognize the newer CPU's through a BIOS upgrade.

Are all of your power cables connected to the motherboard correctly?

elgranchuchu · Jan 2, 2014

Mikemcd :

Yes, if its new it would be enough but with the time the PSU loose power, and if it is too old it doesn't feed the motherboard with enough power.

its very unlikely that you have inserted bad your CPU, because it fits in only 1 way, and whe you have inserted bad the computer turn on but turn off inmediately

Mikemcd · Jan 2, 2014

jayambroziak :

I did not upgrade the motherboard's BIOS, but I just attempted to put in my "old" CPU in and it doesn't want to work with it either. So I am completely unsure. It also seems as if the PSU is working at a lower capacity, the PC does not make any noise honestly, just the sound of air from the fans. No noises whatsoever. Any ideas?

elgranchuchu · Jan 2, 2014

Mikemcd :

jayambroziak :

I did not upgrade the motherboard's BIOS, but I just attempted to put in my "old" CPU in and it doesn't want to work with it either. So I am completely unsure. It also seems as if the PSU is working at a lower capacity, the PC does not make any noise honestly, just the sound of air from the fans. No noises whatsoever. Any ideas?

try with another psu, or without the video card, and let us know

Mikemcd · Jan 3, 2014

elgranchuchu :

Mikemcd :

jayambroziak :

I did not upgrade the motherboard's BIOS, but I just attempted to put in my "old" CPU in and it doesn't want to work with it either. So I am completely unsure. It also seems as if the PSU is working at a lower capacity, the PC does not make any noise honestly, just the sound of air from the fans. No noises whatsoever. Any ideas?

try with another psu, or without the video card, and let us know

Tried both, still nothing.

jayambroziak · Jan 3, 2014

Mikemcd :

elgranchuchu :

Mikemcd :

try with another psu, or without the video card, and let us know

Tried both, still nothing.

Have you tried to reset the motherboard bios (CMOS)? Sometimes the MB will keep the old settings for the hardware and freeze. Try to remove the battery and reset the CMOS.

jayambroziak · Jan 3, 2014

Also, what type of CPU is it? AMD? Intel?

Mikemcd · Jan 3, 2014

It is an AMD FX-6100 and okay

shortstuff_mt · Jan 3, 2014

I would work through this troubleshooting checklist.

Aristotelian · Jan 3, 2014

What about the 4-pin connector that supplies power from PSU to CPU? Is it possibly loose?

jayambroziak · Jan 3, 2014

Mikemcd :

Sorry about that. I know I read what your cpu was in your initial post.

No beeps, just power with running. Hmmm... this has all the signs of not getting enough or any power to the cpu. Do you have or know of anyone with a PSU tester?

Mikemcd · Jan 3, 2014

jayambroziak :

There's a store that is near my house that may have one and they'll check it for free since I'm a regular. I'll test it and post the results.

Mikemcd · Jan 4, 2014

I got a new motherboard, and same issue - NO DISPLAY

But now the CD drive stays open, USB ports still have power... What the hell?

elgranchuchu · Jan 4, 2014

Mikemcd :

Ohh man you are doing it the wrong way, a new motherboard??? that was an insane step, why you don't just try what i told you:

another psu without the video card (conect monitor to the motherboard) and only 1 memory module (if you can try a new one)
and disconect everything (fans, hdd, optical), only leave the power conectors and the monitor

Mikemcd · Jan 4, 2014

Well, the computer requires a 8-Pin CPU connector and my extra's only have one four pin, no extras.

Aristotelian · Jan 5, 2014

Mikemcd :

According to ASUS system specs, the MB has a 4-pin ATX PSU connector:
http://www.asus.com/Motherboards/M5A78LM_LX/#specifications

3 x USB 2.0 connector(s) support(s) additional 6 USB 2.0 port(s)
6 x SATA 3Gb/s connector(s)
1 x CPU Fan connector(s)
1 x Chassis Fan connector(s)
1 x S/PDIF out header(s)
1 x 24-pin EATX Power connector(s)
1 x 4-pin ATX 12V Power connector(s)
1 x Front panel audio connector(s) (AAFP)
1 x Internal speaker connector(s)
1 x System panel(s)

The 4-pin cable powers the CPU. The connector on the MB should look like a little square with four holes in the vicinity of your CPU. If this cable is not connected that would explain why the fans are powering up but nothing is happening.

Mikemcd · Jan 5, 2014

I got a new motherboard, as I posted before - a GIGABYE GA-78LMT-USB3 with an 8-Pin.

I am using two four pins for that 8-Pin. This isn't my first build, this I have checked the connections multiple times.

Mikemcd · Jan 5, 2014

Updated rig:

AMD FX-6100 - 3.2 GHz Socket AM3+
HiS Radeon HD 7750 2GB DDR3 PCI-E 3.0
Corsair CX500 Builder Edition 500 watt Power Supply
GIGABYTE GA-78LMT-USB3 AM3+ Motherboard, up to 125 TDP (Watts for CPU)
Seagate Barracuda 160GB Hard Drive

jayambroziak · Jan 5, 2014

Well, I would consider trying to return the CPU. It seems to me it my be a defective CPU that you have received. 2 different motherboards and still nothing would point me to a bad CPU.

Aristotelian · Jan 5, 2014

OK, so let's get this straight. You have tried new PSU, new MB, and new graphics card. You have tried the new pieces with and without the graphics card.

That would leave CPU and memory. I would think defective memory would be more likely than CPU, especially if they were part of a previous build. Can you put the memory in another computer to confirm that they are working? Then by process of elimination it would have to be the CPU. I would eliminate the RAM before doing a RMA on the CPU.

Just to be clear, when you tried a new PSU was it also CX500?

Mikemcd · Jan 5, 2014

I never used a different power supply, I do not own one. I have tried a different CPU, because I noticed that the BIOS needed to be updated for FX processors. But still, nothing. This RAM is literally 3 months old, it shouldn't be defective. I have spare RAM, so I will (At some point, I am really quite fed up with all this) try my backup DDR3 RAM and put back in the other non-FX series processor.

Mikemcd · Jan 5, 2014

And wait, would defective RAM cause it not to have USB power and not to even POST? Because, I was under the impression that RAM wouldn't cause that issue

Upgraded, now no display but USB ports get power?

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