I've just got a K8V-X SE new CPU and RAM and i can't get it to boot at all, no CPU fan nothing, no light on LAN just the motherboard standby light comes on. Its all compatible, I've checked the system panel a million times all fine. I'm at a loss. Does a brand new AMD CPU need thermal compound on the fan even though there's some grey stuff already on it? I don't understand why even the CPU fan isn't coming on (and yes it is plugged in!), I'm going to try another Power Supply tomorrow but does anyone have any suggestions? I've built a good few computers (no AMD tho) and have never come up with this sort of a problem. Any help would be great.
I know this is a very old thread, but I just now have the very same problem and know how I fixed it. Make sure the floppy power lead is connected snugly with the correct polarity (mine is keyed, but easy to connect incorrectly), and make sure the floppy ribbon cable is connected snugly to the drive with the proper polarity. (The mobo end of the cable is keyed but the other end is not, in my situation.) SANDREW is also correct that you must connect the 4-pin 12V power lead from the power supply. You must have at least a 300W power supply and preferably at least 350W if you have more than just a minimumly configured system (that is, you've loaded your system with goodies).
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Re: NO Power up at all except standby light
I know you say you have the cpu fan connected and assume you have the front panel power switch and restart cables etc.. connected, but have you connected the processor power supply lead from your PSU to the board as Sempron have a seperate power lead to the board to power it up, unlike the old Athlon processors.
If you bought the CPU, Heatsink and fan together then it will already have thermal paste on the Heatsink, so don't apply any more.
Hope this helps, as I don't wish to teach you how to suck eggs!
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When a motherboard does not beep that isnt good news and its either the Motherboard or CPU.
Have you fot the FSB settings correct on the board?
Is your power Supply Good?
Does your graphics card need power and is it plugged in?
Unfortunately the only way to findout exactly is at fault is through a process of elimination.
Can you try a different power supply first?
Also try removing the CPU and re-seating it.
If not, then you need to try and get hold of another motherboard and see if everything works in that. If not then it could be the CPU.
Diagnosing CPU or MOTHERBOARD is always tricky without spares.
Disconnect everything from the motherboard except the power supply connections and cpu fan. Install one stick of RAM and connect your monitor. Then try starting up. See if you get any BIOS boot messages. This will tell you that the board and processor are okay.
With what you say you've tried already, I'm thinking you might have a bad processor. Most every other problem would result in some kind of error like POST beep codes or messages on screen. If the system still doesn't boot with the bare minimum parts installed, replace the processor.
what u may have done is wwhen u were installing the new board, gave a static shock to the system...that will cause only the fans to come on and nothing more...this is a bad problem bc u cannot fix it...if u figure out something else is wrong, and it gets fixed, let me know
it could be two reasons.
1. your RAM has a issue ( try a different ram from a friends pc)
2. your Graphics card is having an issue. ( try removing & fixing back on, if it does notwork.. either get a friends graphics card & ifix on to your pc & chk or fix your VGA card on to another PC & chk if the VGA card works. either way you will find out what wrong.