Nil Einne Posted November 8, 2005 Posted November 8, 2005 I've been running my system basically 24-7 (not under load) for a while now. Today was working on comp in Windows when suddenly my comp seems to reset except nothing happens. The fans are on but blank screen and no post beeps! So I eventually disconnect nearly everything and even remove RAM to see if it makes diff (not yet removed graphics card) but when I start it I always get the 4 LEDs with no post beeps (used to get pst beeps e.g. when prob with my RAM). Fans etc come on and stay on. Don't appear to be able to turn off mobo with switch (holding down doesn't turn it off either). It just sits there doing nothing. I've cleared CMOS quickly including removing battery. Haven't tried an ultra long clear yet. All power connectors are connected to mobo. I read 4 LEDs means PSU detected should get 3 if CPU detected which it doesn't :-( So assuming CMOS clear doesn't help is it likely to be a borked CPU? Altermatively could be a borked mobo but I really hope that isn't the case because I had to buy my mobo from overseas so it's going to be a classy lady to RMA it :-( Share this post Link to post Share on other sites More sharing options...
Nil Einne Posted November 9, 2005 Posted November 9, 2005 BTW, can someone confirm it's normal to have 4 LEDs but no POST beeps if CPU is not detected? Please say yes... Share this post Link to post Share on other sites More sharing options...
Nil Einne Posted November 9, 2005 Posted November 9, 2005 Okay anyway here's an update. I tried a 10 h or so clear, still the same :-( ExRoadie, I haven't tried to do your recommendations with the keyboard and everything. In fact, I'm running without RAM etc. Is it worth trying when I'm getting 4 LEDs do you think? http://www.dfi-street.com/forum/showthread.php?t=29700 Share this post Link to post Share on other sites More sharing options...
Diverge Posted November 9, 2005 Posted November 9, 2005 It doesn't necessarily mean your cpu is bad, if the board is bad the same 4 lights could be on too - they just mean the board is powered. If the board doesn't run code (read the bos chip), then it could be stuckat 4 leds... at least this happened to me on a different dfi board, so i would think they work the same way. If you have any other ways to test your cpu, ram and psu (maybe another motherboard), i would try them to verify all is good with them, and then rma the board. Share this post Link to post Share on other sites More sharing options...
Nil Einne Posted November 9, 2005 Posted November 9, 2005 Well yes as I'm guessing it's either the CPU or the board, but I do REALLY hope it's the CPU. Unfortunately the only way to test my CPU is to take it in since I don't have access to any other 939 mobo nor do I have access to another 939 CPU. This will cost me if the CPU is okay but I don't have any other choice. The PSU seems fine, at least the fans, drives etc come on. I'll try it with another mobo but it might not tell me much more since I don't have any other mobo which uses the 4 pin. Similarly for the RAM and graphics but I doubt it's them because as said, if I remove RAM totally I used to get post beeps, now nothing. Share this post Link to post Share on other sites More sharing options...
Nil Einne Posted November 9, 2005 Posted November 9, 2005 Hmm so I've tried the 2 different sticks of RAM (my RAM appears fine in any case) and the PSU and also with a working PCI graphics card still the same :-( Share this post Link to post Share on other sites More sharing options...
TheAzazel Posted November 9, 2005 Posted November 9, 2005 Hmm so I've tried the 2 different sticks of RAM (my RAM appears fine in any case) and the PSU and also with a working PCI graphics card still the same :-( Do you have plugged all power connectors to the mainboard? I think your mainboard or CPU have a serious problem (maybe broken). Could you test your cpu on other mainboard? a friend? good luck! Share this post Link to post Share on other sites More sharing options...
bldegle2 Posted November 9, 2005 Posted November 9, 2005 i have had MB's just go south all at once, usually some kind of chipset failure. finicky little pieces of electronics. bummer. baldy Share this post Link to post Share on other sites More sharing options...
EdLSmith Posted November 9, 2005 Posted November 9, 2005 You might have losr the 5 Volt Rail n your PSU. Do you have a second PSU or Multi-meter to check that. Too little info to make good diagnosis. Most likely culprit is PSU, next most likely is CPU. 4 leds are lit during power up and search for CPU. 3 leds indicate found CPU and searching for RAM. With the sudden onset, I would suspect PSU. Share this post Link to post Share on other sites More sharing options...
Nil Einne Posted November 9, 2005 Posted November 9, 2005 Well as said, the PSU works with another comp and as far as I know, my PSU only has one +5V rail so I highly doubt the +5v rail is dead. However I'm unable to test the 24pin of my PSU as I only have a 20 pin mobo to test it with and I also can't test the extra 4 pin 12V so it's possible something is not being picked up in the other test. My PSU def has two 12V rails so maybe one of them is not being tested I don't know about that. Share this post Link to post Share on other sites More sharing options...
red930 Posted November 9, 2005 Posted November 9, 2005 Try the full Clear CMOS as described here... http://www.dfi-street.com/forum/showpost.p...04&postcount=24 If that fails to bring it back to life try another PSU. Preferably one that meets the DFI recommendations. We're just trying to get past the 4 LED issue which can occur due to a failing PSU. Share this post Link to post Share on other sites More sharing options...
EdLSmith Posted November 9, 2005 Posted November 9, 2005 That's your problem, need 24 pin connector from PSU. Check the PSU requirements on this link: http://www.dfi-street.com/forum/showthread.php?t=10854 Native 24 pin required. Share this post Link to post Share on other sites More sharing options...
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