All PC Lights and Fans Are Working, But Monitor Receives No Signal and Keyboard/Mouse Lights Show No Signs Of Power

[Ephecs]

As the title says. I am currently in the process of building a new PC, and I got everything hooked up the way it was supposed to be. All fans are running (CPU, graphics card, main fan), lights were on, things looked to be working beautifully. I know that this is not necessarily signs of a successful boot, but I thought it should be mentioned.

However, when I hooked up my monitor, it did not receive a signal. I thought at first that maybe I had plugged something into the wrong somewhere, but I read later that the motherboard might be at fault if a monitor is simply not receiving a signal. I decided to test this by plugging in my keyboard and mouse; the lights on either of these failed to work as well.

So the main question: is my motherboard at fault for this?

My PC specs:

Motherboard: MSI A78M-E35
PSU: Corsair CX 430W
Hard Drive: Western Digital Black 1TB
Graphics: Sapphire Radeon R7 260X
Processor (CPU): AMD Athlon X4 260k
RAM: 8GB Crucial Ballistix Sport

 

[digitaldoc]

The GPU may be the culprit. Start by removing it, and trying the monitor with the integrated graphics. If that does not work, try running the system with only 1 stick of RAM inserted.

 

[Ephecs]

The GPU may be the culprit. Start by removing it, and trying the monitor with the integrated graphics. If that does not work, try running the system with only 1 stick of RAM inserted.

UPDATE:

Got a new motherboard and installed, still no go. No signal to monitor, no keyboard light, no beep. Removed the RAM and the graphics card separately, no dice. Any further help? Is this a CPU problem?

 

[digitaldoc]

Could be CPU, RAM or PSU at this point.

http://pcsupport.about.com/od/findbysymptom/tp/computer-wont-turn-on.htm

 

[Ephecs]

Could be CPU, RAM or PSU at this point.

http://pcsupport.about.com/od/findbysymptom/tp/computer-wont-turn-on.htm

Okay, I've been led to believe that this is a CPU problem. You're going to shudder when you hear this, but I removed my CPU's heat sink and powered on the PC. I know that's a horrid idea, but I thought it was the best way to test if the CPU was being powered. To my knowledge, it isn't.

The CPU shows no sign of heat whatsoever. Should I just order another processor and hope that that was the problem?

 

[digitaldoc]

More likely to be a power supply problem than the CPU. Would start replacing the PSU.

 

[Ephecs]

More likely to be a power supply problem than the CPU. Would start replacing the PSU.

Replaced the power supply with an identical copy. No dice.

I wanted to add that I appreciate your feedback so far and apologize if this seems like a stubborn situation... because it is.

 

[Ephecs]

UPDATE:

I removed the RAM and the video card and powered up the PC. I got continuous beeps from the motherboard - does this indicate a RAM problem?

 

[digitaldoc]

http://pcsupport.about.com/od/nonworkingcomponent/ht/beepcodestb.htm

The above is the link to what the beeps mean.

So, if I understand this, the system does absolutely nothing with the RAM inserted, and beeps continuously with the RAM removed?

 

[Ephecs]

http://pcsupport.about.com/od/nonworkingcomponent/ht/beepcodestb.htm

The above is the link to what the beeps mean.

So, if I understand this, the system does absolutely nothing with the RAM inserted, and beeps continuously with the RAM removed?

Yes, correct. At first I removed both the RAM and the graphics card at the same time and got continuous beeps, one after another, maybe 1-1.5 seconds long each. I then reseated the graphics card and the same thing happened. This suggests a RAM problem, no?

 

[Ephecs]

I made an unlisted YouTube video that records the sound of the beeps. This was done with everything in the PC apart from the single stick of RAM I have. I reseated the graphics card and it still did this. Here's the link:

https://www.youtube.com/watch?v=Tp1kphEnpSQ&feature=youtu.be

 

[digitaldoc]

Yes, this is looking like a RAM problem. Get new RAM. I have had good luck with Corsair through my builds.

RAM issues are always a pain to diagnose.

 

[MasterGreen002]

Has new RAM fixed your problem? I'm asking because I have the same issue.

 

[Banketss]

As the title says. I am currently in the process of building a new PC, and I got everything hooked up the way it was supposed to be. All fans are running (CPU, graphics card, main fan), lights were on, things looked to be working beautifully. I know that this is not necessarily signs of a successful boot, but I thought it should be mentioned.

However, when I hooked up my monitor, it did not receive a signal. I thought at first that maybe I had plugged something into the wrong somewhere, but I read later that the motherboard might be at fault if a monitor is simply not receiving a signal. I decided to test this by plugging in my keyboard and mouse; the lights on either of these failed to work as well.

So the main question: is my motherboard at fault for this?

My PC specs:

Motherboard: MSI A78M-E35
PSU: Corsair CX 430W
Hard Drive: Western Digital Black 1TB
Graphics: Sapphire Radeon R7 260X
Processor (CPU): AMD Athlon X4 260k
RAM: 8GB Crucial Ballistix Sport

I have the same exact problem did you ever fix it

 

[DSzymborski]

For the last two responders: this is where you start a new thread describing your problem with your complete, exact specs. This is not the point where you necro a thread from 2015 from someone with vaguely similar problems and completely different hardware.