First, double check that everything listed at the following link is actually connected, and where applicable, is fully seated. To the point of DISCONNECTING each thing, and reconnecting it. That includes removing the memory and graphics card and reinserting them. You couldn't possibly believe how many times the answer to some question like yours turned out to simply be take it out and put it back in. Leave the graphics card out for now though, until after you've done the next part below, so you don't have to take it out twice.
"No POST", "system won't boot", and "no video output" troubleshooting checklist This checklist is a compilation of troubleshooting ideas from many forum members. It's very important to actually perform every step in the checklist if you want to effectively troubleshoot your problem. 1.Did you...
Then, after you've checked it all, do this.
BIOS Hard Reset procedure
Power off the unit, switch the PSU off and unplug the PSU cord from either the wall or the power supply.
Remove the motherboard CMOS battery for five minutes. In some cases it may be necessary to remove the graphics card to access the CMOS battery.
During that five minutes, press the power button on the case, continuously, for 30 seconds. After the five minutes is up, reinstall the CMOS battery making sure to insert it with the correct side up just as it came out.
If you had to remove the graphics card you can now reinstall it, but remember to reconnect your power cables if there were any attached to it as well as your display cable.
Now, plug the power supply cable back in, switch the PSU back on and power up the system. It should display the POST screen and the options to enter CMOS/BIOS setup. Enter the bios setup program and reconfigure the boot settings for either the Windows boot manager or for legacy systems, the drive your OS is installed on if necessary.
Save settings and exit. If the system will POST and boot then you can move forward from there including going back into the bios and configuring any other custom settings you may need to configure such as Memory XMP, A-XMP or D.O.C.P profile settings, custom fan profile settings or other specific settings you may have previously had configured that were wiped out by resetting the CMOS.
In some cases it may be necessary when you go into the BIOS after a reset, to load the Optimal default or Default values and then save settings, to actually get the hardware tables to reset in the boot manager.
It is probably also worth mentioning that for anything that might require an attempt to DO a hard reset in the first place, IF the problem is related to a lack of video signal, it is a GOOD IDEA to try a different type of display as many systems will not work properly for some reason with displayport configurations. It is worth trying HDMI if you are having no display or lack of visual ability to enter the BIOS, or no signal messages.
Trying a different monitor as well, if possible, is also a good idea if there is a lack of display. It happens.
You are CERTAIN that your memory is installed in the SECOND and FOURTH slots over from the CPU? The A2 and B2 slots? If you install the memory in the A2 and B2 slots, which are the second and fourth slots going left to right, and you have verified memory issues, then it can only really be three things.
1. Faulty motherboard
2. Faulty memory (Or incompatible with that particular motherboard.)
3. Bent pins on the CPU (Or incorrectly installed CPU cooler CAUSING it to ACT like it has bent pins, because the CPU is cocked due to uneven pressure in the socket)
If the memory IS installed in the second and fourth slots (For 2 DIMM population) and none of those things are to blame, then it is not a memory issue almost certainly. I say almost, because electronics can be fickle so, you never know and should never say never or it will come back to bite you in the soft parts.