PC problem

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HlTMAN

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Hi I have a :

Intel Core 2 Duo E7300 1066FSB + Foxconn cpu cooler @ 2500RPM
Biostar TP35D3-A7 Deluxe motherboard
1024Mb DDR3 1333Mhz
MSI Geforce 8600GT 512mb 128bit DDR2
80GiG Samsung IDE harddriv
390watt Coolermaster PSU

When I press the ON button on my mobo or even the on/off switch on my case , my system runs for 3 seconds and then dies.The second my CPU fan stops turning , the system comes back on again and shuts down again after 3 seconds repeating that the whole time.

I have tried everything.Bought a new psu , unpluged my hdd ,vga card everything except ram ,cpu.And it still does the same thing.

My spu has a 20+4pin power connector and a 4pin 12v connector.The motherboard has space for 2x12v connectors.But I talked to some people and they say 4pins are enough.

So what do you guys think the problem is?Please help :(
 
old pc that i upgraded.

upgraded the mobo,cpu and ram and psu
 
no beeping? sounds like the mobo or psu

try using your psu on your old mobo and see if that works, if it works its problably be the mobo.
 
assuming that all the connections are tight and in the right place, and you don't have any loose screws underneath the motherboard.
 
there is 1 thing.my mobo has a 8pin 12v CPU plug and my PSU only has a 4pin 12v CPU connecter.might that be the problem?
 
ok i did that.and i dont think its going to solve my problem but oh well
 
over the last few weeks iv'e seen quite a few posts about pc troubles, funny enough from my observations none of them are AMD.

just and observation ....
 
HlTMAN said:
there is 1 thing.my mobo has a 8pin 12v CPU plug and my PSU only has a 4pin 12v CPU connecter.might that be the problem?
Click to expand...

Probably not, because apparently the 4-pin ATX 12V connector delivers the same power as the (older) 8-pin connectors did. My motherboard also has an 8-pin connector and my PSU a 4-pin.

Try reseating your CPU (apply new thermal paste as well).
 
The_Techie said:
Probably not, because apparently the 4-pin ATX 12V connector delivers the same power as the (older) 8-pin connectors did. My motherboard also has an 8-pin connector and my PSU a 4-pin.

Try reseating your CPU (apply new thermal paste as well).
Click to expand...

Thanks for confirming, as I mentioned tonight, my hardware knowledge really does suck :p

Could be a dud mobo IMHO ;)
 
I often find that people tend to forget the simplest things and try and dig to deep solving problems.

have you checked to make sure that your power switch or reset button is not stuck ? - they both have little springs and if you push to hard and they get stuck inside the case you also have the affect of the pc rebooting every few seconds.

remember that if the actual switch is stuck you button can still pop out to default location, push the button in and feel if it is not stuck.

you can also try formating the drive on another pc, i know someone who had this p[roblem and solved it after he reformated his drive, odd i know but it worked.

as a last resort. unplug everything on your mobo, everything. leave it standing for 2 days and then plug it all in. i once had a pc that was just dead, i tried everything to get it working and got so pissed that i ripped out all the plugs and tossed it one side. after 2 days i decided to give it a try and it just started working again. iv'e seen some weird stuff in my life time where pc's are concerned .....
 
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the symptom you describe is typical of a cpu that isnt receiving enough power. i can give anecdotal evidence that certain motherboards require a 2x4 12v cpu power, and a 2x2 connector, although it has enough amps on the line, physically doesnt connect to the other part of the 12v circuit required by the cpu.

this is easily solved with a 2x2--.2x4 converter, something intel and foxconn motherboard typically ship with in the box. for a good reason. perhaps your board does indeed need a 2x4 connector?

also, there are two diagnostic led's on the board...if they are both out, it indicates a fault with either cpu or motherboard.

one lit is fault with ram, the other lit is fault with gpu, and both lit means all is ok.

if on yours they are both out then i would investigate a 2x2 to 2x4 adapter before getting an rma.

excerp from an intel mb manual, with regards to the 2x4 power area
1. Connect the 12 V processor core voltage power supply cable to the 2x4 connector. Use the 2x2 to 2x4 adapter if needed.

NOTE: Do not use the 2x2 to 2x4 adapter when using an Intel® Pentium® processor Extreme Edition or a processor that is not running at its default settings. Doing so may result in damage to the desktop board.
Click to expand...
it is obvious from the above that some boards require all 8 pins hooked up to juice, and, depending on the cpu used, an adapter may not be sufficient and you will need the correct psu.
 
Okay thank you werner.Do you think it can be the mobo/cpu thats faulty?Or can it definatly be the power?
 
cpu's are rarely faulty out the box. same with motherboards. but seeing as you dont have any spare stuff to swop out to confirm, anything i say is just an educated guess.

to narrow it down you either need to swop out bits, or fit that adapter cable to the 2x4 socket.
 
Strangely enough I have never encountered a motherboard that requires a 2x4 connector :o But werner's word is good enough for me, definitely try his suggestion :)
 
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