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Computer only posts without ram installed.

5.1K views 7 replies 3 participants last post by  Wrench97  
#1 ·
This is my first build so I understand that it's totally possible I am at fault in some way here. However, I cannot seem to figure this one out. The build will only post when absolutely no ram is installed. I do receive BIOS beeps during this. Otherwise, it simply goes into endless reboot. No BIOS beeps during this. I have tried two motherboards, two power supplies, two brands of ram, and I am truly at a loss.

Motherboard- Asus p8z68- v pro/gen3
ram- 12 GB 1333 Crucial or 4Gb 1333 Kingston
CPU- Intel I7-3770K LGA 1155 3rd generation
Power supply- ThermalTake 750 Watt or (random, retail brand) 450 Watt
No Graphics card installed.
No sound card installed.
Lite-on Blu ray reader/writer
750 GB Seagate Momentus Hybrid

I have tried so many fixes recommended for problems similar and nothing has worked. So i decided to approach the forums myself.

I have tried resetting Cmos, Running with no ram, running with only ram and cpu, Switching on and off TPU and EPU, as well as checking for shorts by removing both buttons and full on devices one at a time.
 
#2 ·
With no RAM installed, you should get a beep code, when you boot, if the Mobo is good.
No RAM-no beeps indicate a Mobo problem.
The best option is a bench test.

Remove EVERYTHING from the case.
Set the motherboard on a non conductive surface. The motherboard box is perfect for this. DO NOT PLACE THE MOTHERBOARD ON THE STATIC BAG! It can actually conduct electricity!
Install the CPU and heat sink.
Install 1 stick of RAM.
Install the video card and attach the power supply connection(s) to the card if your card needs it.
Connect the monitor to the video card.
Connect the power supply to the motherboard with both the 24pin main ATX Power connection and the separate 4 or 8 pin power connection.
Connect power to the power supply.
Do NOT connect ANYTHING else. Make sure you have the power connector on the CPU fan connected.
Use a small screwdriver to momentarily short the power switch connector on the motherboard. Consult your motherboard manual to find which two pins connect to your case's power switch. Then touch both pins with a screwdriver to complete the circuit and boot the system.

If all is well, it should power up and you should get a display. Then assemble the parts into the case and try again. If the system now fails to boot, you have a short in the case and need to recheck your motherboard standoffs.

If the system does not boot after this process, then you most likely have a faulty component. You'll need to swap parts, start with the power supply, until you determine what is defective.
 
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#3 ·
I have tried this method once before and came up empty handed. However, another instance I have noticed that the system actually stays powered on without the 8-pin power connector. But with it connected, it returns to the infinite reboot. I've tried two power supplies and came to the same conclusion each time.
 
#4 ·
Just an update: I am now currently running the motherboard on top of its box, with nothing but the cpu, cpu fan, power supply, and a single stick of ram in B1. Same issue is still occuring. All other parts are still in case and not connected.
 
#5 ·
System is still not functioning correctly. I can only assume a faulty processor at this point. Power supply has been volt tested, motherboard has been rma'd and new one has been purchase, ram has been switched to different brand. I'm running it down to either the processor or the fan. is this possible?
 
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