Question about MSI K8N Neo4-F Motherboard
What the tip and the manual are referring to is taking steps to avoid ESD (Electro Static Discharge). The manual wants you to disconnect all power before handling anything on the m/b or even the board itself. The tip is reccomending that you handle the board only by the usb or printer ports as these have grounded RF sheilds on them. The problem I have with both of these suggestions is that they don't go far enough. If you do what they say then NOTHING is grounded and the chances for an ESD event are much greater. If you really want to avoid ESD then you should wear a ground strap that is tied to a grounded chassis or even connects directly to the ground prong of an electrical outlet whenever you're working on the inside of the machine. When the machine is plugged in, it is grounded by the power cord ground.
Your problem sounds more like an issue with +5v standby voltage to the PS/2 and USB ports. This is used to either turn on or wake up a system in sleep mode with keyboard/mouse events. I would disable it if you can but from skimming through the manual I didn't see a specific jumper for this. Check your BIOS settings for entries that have to do with S1 or S3 wake up events and make sure they are disabled.
Another possibility is the +5v rail of your power supply isn't very stable. I know you had it checked but power supplies can very flaky when it comes to ambient temperature and some problems only turn up when under a heavy load.
It could also be a memory issue but memory issues can be caused by an unstable power source.
Finally check the ground on your electrical outlet. As strange as it sounds I have seen plenty of outlets where the ground lug wasn't connected to anything, particularly in older homes. In terms of home safety this is fine as long as that circuit is protected by a GFI but in computer terms it's a disaster looking for a time to happen.
Posted on Jan 18, 2008
From what u say i believe u\re problem is the power supply (or even the power source of u\re house...fluctuations on it ...).
If u can measure u're power supply params. do so (without anything connected to it, forced in on mode ...(short between the green and a black wire )) !
If not, than try to remove everything from the case, including the power supply, and connect them is such a way that there is no connection between them, other than the needed wires ..(so to be able to exclude a short between them ... ). If this will keep u;re system stable, then u'll have to isolate the components between them in the case .....
But before all this u might try a BIOS upgrade or downgrade, this could also cause big problems if the BIOS soft. is not properly made, or has incompatibilities issues with some of u're components...
Although it may not be u're hard drive, they can also cause problems (rarely), so if u can test it, do so !
Posted on Jan 18, 2008
It looks like you really have tried everything so bare with me if I say something you already tried.
If you mentionned all the components of your systems, I calculated that you need a 400W power supply (your system only consume about 330W but you need headroom so 400W is about right) Make sure your power supply is good, I'm saying that because I had the exact same problem with one of my motherboards and it was the power supply that looked OK but was indeed bad. If your components are starving for power or the voltages are unstable it will reboot.
ESD stands for Electrostatic discharge and would have happened when manipulating your components, if you were not grounded (best way to ground yourself is to leave the plug in the PSU but turn OFF your PSU at the power switch behind the power supply, that way your case will still be grounded) The fact that you did mention that your motherboard was tested OK and so was your processor is puzzling.
An other thing that may seems obvious but I'll ask anyways, did you put thermal paste on the processor and made sure the heatsink is seated right? Check in your BIOS all the health data, voltages, temperature and fan speed. Make sure all your voltages are within range ~3% for good stability.
An other thing is your graphics card could bring your whole system down, it happens. It usually is power supply related but I wish you had a basic graphics card to plug in to test your system stability.
This is just my 2 cents, I know most people will not answer you because they are scared you will bring their rating down, but hey, most of the time I get bad rating even if i answer right on the money so I don't care anymore. Let me know what happens, I'd be curious to know what the problem was.
Posted on Jan 18, 2008
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