Hi guys. I had my pc for about a year-working fine till now. (its an Asus motherboaRD,AMD 64 3200+,2x512 ram ddr). I was watchign a film on it last nite,was working fine. This morning switched it on as normal to check e-mail etc. It bootted up fine, but then before it went to the windows logging screen it powered off. Clicking on the power button didnt work. to switch it back on again, i had to remove it from the mains and connect it again. Switched it back on and again it powered off at the same point. I havent had the time yet to do any troubleshooting as i had to go to work, but i tried to log-in via safe mode, i log in normally and as soon as it tries to load window's it powers of again (no blue screen no nothing,just switches off and cant' switch it on until i remove it from the mains and reconnect it). i checked the CPU fan seems to be working fine. I've heard some stuff on dodgy MOBO capacitors, but havent checked... any ideas anyone had something similar happen?
Hello The problem can be determined by the type of switch off, your motherboard will enter "soft mode" if your PC's CPU reaches a high temperature meaning your heatsink has lost contact with it. - Soft mode is when the motherboard LED is still lit after switch-off, if your PC switches off again check the LED (green bulb on motherboard), if lit then check your CPU heatsink. It would be a good idea to monitor your CPU temperature in Windows. If, however, the LED light is OFF it could mean a short-circuit with components, check all cables and make sure there is no copper terminals showing or cut wires, upon a short-curcuit the PSU switches off the power. NB: I'm not 100% sure if the LED light goes out after a short-circuit, but I know you can't turn the PC on untill you unplug at the mains for about 10 seconds. If you can turn your PC back on without unplugging then it seems like your CPU is overheating Good luck, let us know how you get on
just a note the mother board is Asus A8N-SLI SE Socket 939 Nvidia NF4 SLI ATX - Sound, Giga Lan USB 2.0 1000MHz FSB
ok i will try that..hopefully it's nothing serious.. hopefully i can try re-installing windows again, if that goes ok then it;'s not a hardware problem, if it doesnt i quess then i am in trouble...
on that note i remember my pc shutting down in windows only, which found later to be a problem with the RAM voltage, which when I set to 1.3v worked perfectly but this was a new system so shouldnt be a problem with yours but worth noting if you've had your sticky dabs in bios also worth a try resetting bios to original settings if problem continues, if it resets in bios or dos (remember that?) then it could be the above problems i mentioned before, if it's ONLY in windows then it could be hardware or bios setting fault... possibly a driver error, but its common to reset not switch off
oh hell, I had this problem a while ago, I ended up buying a new overpowerful power supply, and then realized it was my motherboard that was wrong, this took me 3 months to figure out, I hope this is not the same problem as mine was. I have basically same setup as you from what you have told so far, apart from motherboard. Here's a video from a while back of what my PC did, even after I had put in my new thermaltake toughpower 600W power supply, as you can see in the video -
dude,mine does not even log into windows,,,,,,it just powers-off before windows loads, it's strange, not sure if it a hardware issue,i went into bios setup yesterday checked my cpu temp which was under 40c as normal, cpu fan working, and it did not shutdown,if it was a psu issue,logically it should av powered off after sometime even if i was in setup?i'll do some more checks and update you...
ok so this is what i have done up to now: 1. Loaded last good configuration-loads up powers off 2. Changed bios-restarts, powers of before loading windows 3. Loaded up windows resotre mode(windows domain config),loads up and powers off again 4. Loaded safe mode with networking-i manage to log in to windows,before loading the start-up menus etc, powers off. 5. Loaded safe mode only with ms-dos prombt loads up and working fine...which IS REALLY WIERD AND ANNOYING....i removed the latest windows update which was done on the 29th...restarted still powers of in normal windows mode,,, I want to tryh and repair windows,but now the pc does not swithc on at all, although the green led on the motherboard is on etc...so no idea what the hell is goign on, could this be anything with my mains? the prob i have other things on it,,on the plug and they are working fine,,which is strange
so that rules out the poss of a shorting. have you tried formatting, it may be a driver proplem, or as rimmer says a buggered mobo which is where this might be leading to im afraid, another thing to try, if you have more than 2 ram sticks take all out and leave one, see if that helps, swap the sticks at least once to see if changes anything as it may be buggered stick. also, what does your BIOS say for ram and cpu voltages'. set them to AUTO where poss
ok i tnk i may have found the problem, it was weird how i could log in to safe mode without network support, so i removed the ethernet wire,, and it worked,,however i first resotred windows to a previous date so that could have helped either... to try that again,,,i put the wired back on, restarted (it didnt even restart it powered off) restarted again, powered on with the wire in, when loading windows it powered off again,., so i restareted windows again without the ethernet wire, and it starts up normally logs into windwo's fine etc etc,,,however i do get a mcafee issue,,so am wondering whether it could some sort of virus of some sort,,but it shouldnt really affect the pc powering on and off should it? so i think that could have sold the problem, issue is, why all of a sudden?.,,,,and when i put the wire back in when i am logged into window's i can put the wire back in and surf the net as normal..really strange, i couldnt rollback the drivers, because there werent any,,,not sure what to do here.
Hi there, just a thought but have you tried to update your BIOS, just a thought but I'm sure in my BIOS there's a setting for POST CHECK LAN CABLE(Enable/Disable) etc....!!!!! And I'm thinking from what you describe above, that it could have something to do with your problem if your BIOS is corrupted in some way and is making a mess of the values for the CHECK LAN CABLE during POST, and so is causing your PC to not BOOT Windows, but then removing the LAN Cable, is changing the values for the LAN CABLE CHECK during POST allowing you to BOOT, then once Windows has booted and you re-connect the LAN cable it's fine until the next time you come to run POST with the cable connected..... So try looking in your BIOS for the settings for POST CHECK LAN CABLE and disabling it.... If that doesn't work try updating your BIOS Hope this is all making sense....!!!!! It's just a theory....but seems to be reasonable based on your description of the symptoms..... GOOD LUCK And please let me know if it helps.... Thanks Kaz
Hi Thanks Well i solved the problem, i am not sure if it was the bios or not..it could have been but i have to admit i didnt check. When and bought myslef a cheap network card and it works as a charm! Thanks 4 your help guys!
