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Discussion Starter · #1 ·
Installed a heat sink/fan and now nothing. No beeps. Psu and sink fan work. Green lite on mobo.

specs

ASUS M2N-MX SE AM2 Nvidia 6100 DDR2-800 Nvidia Geforce 6100 IGP mATX Motherboard

AMD Athlon 64 X2 Dual-Core 4000+ 2.1 GHz Processor Socket AM2

Cooler Master 2U EMBEDDED Cooler (DK8-9GD4A-0L-GP) for AMD AM2- Active Solution

Any ideas? tks
 

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Check all the connections in the PC and reseat the RAM. It's easy to knock something loose while working inside the case.
 

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Discussion Starter · #3 ·
I tried that a few times with different sticks. Still no beeps or video. Tried on board and after market card. I can hear the dvd and hd kicking in. Have a feeling it's mobo or cpu only year old
 

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Try on the bench to effectively determine the fault.

1) Remove EVERYTHING from the case
2) 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! We are going to try and assemble a running system outside of the case.
3) Install the CPU and heat sink. Intel Guide AMD Guide
4) Install 1 stick of RAM.
5) Install the video card and attach the power supply connection(s) to the card if your card needs it.
6) Connect the monitor to the video card.
7) Connect the power supply to the motherboard with both the 24pin main ATX Power connection and the separate 4 or 8 pin power connection.
8) Connect power to the power supply.
9) Do NOT connect ANYTHING else. Make sure you have the power connector on the CPU fan connected.
10) 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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