I am having this problem with this computer , if I am in windows say and shut down it shuts down perfectly . But if I want to reboot 70% of the time it will hang , and I have to reset to get it to work properly , same thing if I am in ubuntu , if I shut down no problems , but if I want to reboot 70% of the time it wont , it will just hang . This is a Foxconn 6100K8MA m/b with Athlon 64 bit 3500+ S939 CPU . I am sure it is a bug in the motherboard , sometimes it works , sometimes it does not . Anyone heard of this before . This computer runs perfectly most of the time apart from this bug or whatever , it is not overclocked , and runs cool temps all the time .

I thin its a bug in the motherboard.

Well i would actually be looking more at the power supply OR possibly a harddrive issue. however i would check you pc with anti virus and spyware tools first. if this doesnt help then i would recommend trying a new power supply unit.

download and install
spybot serach & destroy 1.5 (NEW)
http://www.safer-networking.org/en/...
AVG Free
http://free.grisoft.com/

AVG Anti spyware
http://free.grisoft.com/doc/29116/u...

AVG Anti rootkit
http://free.grisoft.com/doc/29116/u...

Lavasoft adaware 2007 free
http://www.lavasoftusa.com/products...

CW Shredder standalone
http://www.intermute.com/products/c...

ATF Cleaner
http://www.majorgeeks.com/ATF_Clean...

run the updates for all of these programs, then go into safe mode and run them one by one not all at the same time. If you have another Anti virus tool then remove that before installing AVG free.

Also go to Start >> Run type: msconfig
look at all the enterys under the STARTUP tab and carefully deselect those you believe are Malicious, if you are unsure type them on here and we can instruct weather to remove or not.

do this and then come back with results.

Well my PSU is an Antec 550 and is not all that old , my HDD is a 320Gb not all that old either . I spend more of my time in linux so I cant run those windows tools anyway .

Thanks for your answer , I am also thinking there is a possibility my cmos might be getting mixed up with looking for partitions , as I have a few on this HDD . I may even try putting another smaller HDD say a 40 Gb termporarly replacing my 320Gb HDD , and put an operating system on it , just to try out this theory :)

If this issue affects TWO different OSes I would say it is probably a hardware problem. PSU or RAM would be the first things to look at. You can test RAM from a boot floopy or CD. Try memtest86. One other possibility might be some setting in the BIOS causing the hang.

Whatever operating system you use, you must load the drivers for the mboard after the Setup is finished, particularly the main chipset drivers, - if you don't you will likely have all sorts of problems, including ACPI problems, which affect how your computer Shuts Down or Restarts or sometimes how it boots in general.

If you have those loaded, take a look in the bios Setup to see if there is a setting to delay hard drive detection, and if there is, Enable it and set it to some time - say at least 5 seconds.
If you don't have that try disabling Quick Boot or similar in the bios Setup to see if that helps.
Some hard drives aren't detected properly every time you boot from power off unless you do that.

Thanks for your answers , I have tried everything I think , run memtest86 for 1/2hour with no errors . Tried different settings in CMOS , tried it with ACPI disabled , it runs but with errors , which I expected . Runs perfect with ACPI . Tried different setting on Hard drive delay , it was set at 5 secs but I changed it to 10 seconds , it did not make any difference . Default is 5 secs. Does not seem to have quick boot . Tried various other settings with no result of fixing problem .

When I think of it , I have had this problem since I built this computer , but have never worried about it , as in every other area it runs perfectly . I will try this other 40 Gb PATA Hard Drive with linux on it and see what happens . If that still gives me problems , I may flash the bios to the latest , as that is something I have not done , but while it has this startup problem I have hesitated on doing that . If anyone has thought of anything I have missed would appreciate you sharing :)

Thanks :)

Running memtest for half an hour isn't long enough.

OK well when I get time I will run it for longer , but I would have thought 1/2 hour would have picked up an error . And just an update on what I wrote previously this is a 4200+ duel core CPU S939 not an AMD 3500+ venice that I thought was in it :) I just enabled super boot and delay 4 sec from Instant off in the CMOS, and it made a difference to the reboot that it worked like it should. Then I disabled superboot and set delay 4 sec back to instant off , and it is still shutting down and rebooting like it should . I will try it again later and see what happens :) Hopefully I can isolate it .

This is a very strange computer :)

You have an excellent PS brand in Antec, but any PS can become faulty. My brother's Antec became faulty and eventually it became difficult to get his computer to boot. Try another PS - if the mboard has no PCI-E slots a 300 or 350 watt one will do for testing purposes - if it does have PCI-E slots, about 430 watts is a better minumum.

Don't ever flash your bios unless you find specific information in release notes or similar that mention your problem - bios updates that cure a startup problem are extremely rare for more recent mboards.

You could try loading bios defaults, but if you do I recommend there be a delay detecting the hard drives.

"Running memtest for half an hour isn't long enough."

I disagree. If it passes a couple of complete passes there is no need to test further.
If you do get errors, or if you run it longer and do get errors occasionally, it's extremely unlikely the ram is bad - the most likely thing is the ram has, or has developed, (a) poor connection(s) in it's slot(s).
See response 2 in this - try cleaning the contacts on the ram modules :
http://www.computing.net/hardware/w...

By the way, did you make sure the ram you installed in this mboard is listed as compatible?
See response 5 in this for some info about ram compatibilty, and some places where you can find out what will work in your mboard for sure:
http://www.computing.net/hardware/w...
Correction to that:
Mushkin www.mushkin.com

I have changed the Antec 550 PSU, I noticed that I had used a 20pin plug in a 24pin M/B but I have done that before with no problems , but I changed it to a thermadyne 430 I think from memory with a 24 pin plug . No change , still does the same thing . My RAM is Kingston which is compatible with this M/B and is working quite happily on dual channel configeration . Cleaned the slots & contacts , no change . I really dont know what else I can do to this motherboard except try and live with the problem as it is a great board and I have not had any other problems with it . If I could get time I would change the HDD to another , just to get that possability out of the way . Back to research I guess :)

MintabiePete

FYI

Newegg has the 6150 version of that MB on sale right now. $45 with a $10 mail in rebate - $35 net.

http://www.newegg.com/Product/Produ...

Thanks mate for that link , but unfortunately I am in Australia and last time I tried , I could not get anything from Newegg. It looks good , but if I replace it I will most likely go Gigabyte or DFI :)

Socket 939 boards are hard to find. Last I heard Newegg still didn't ship outside the USA.

I thought your name was familiar - you posted on Lanyon Computer's Constructor's Corner a few times?? I answered using Mike on that site. Lanyon Computers is no more. Constructor's Corner went offline in October.

Yes I knew Lanyons had finished , small world isn't it . Yes , I got a lot of help from the staff at Lanyons & those on Constructor's Corner when I was first into computers :) Computers have come long way since those days :) And I guess we have too :) Yes I remember you posting , you helped a lot of people :)

"Socket 939 boards are hard to find."

I believe you can use socket 939 cpus on AM2 (socket 940) mboards no problem - check the CPU compatibilty lists - but the ram required is DDR2, not DDR like you already have.

Where did you get that Info ?

This is what is says on the AMD site

Q: What are the major differences between socket AM2 and socket 939-pin?
A: Socket AM2 provides support for DDR2 memory. Socket AM2 is almost identical to socket 939 but uses a protective mechanism (a manufacturing “key”) designed to prevent any socket 939-pin CPUs (DDR1 only) from being inserted into a socket AM2 motherboard, and to prevent socket AM2 CPUs (DDR2 only) from being inserted into a socket 939-pin motherboard.

Oops. I got that wrong.