Topic: motherboard 4 pin 12 volt problems advice much needed.

[Rik]

Have you tried booting from a Linux CD? Assuming you changed the System drive, the machine wouldn't work. Where was the mobo at the time?

[martin_uk1]

everything i try does not work without the 12 volt connector the hdd does not spin.

[Rik]

So, did you change the system drive and where was the mobo.

Until you can get this resolved, my best advice would be to try and recover the images to another machine, then try starting up the machine with only the graphics card installed. If that works, add one device at a time till it breaks. If it doesn't then it's most likely mobo or PSU, which is why the location of the mobo when you fired it up is critical.

[martin_uk1]

ill try that later see what happens but since i dont have a 12 volt 4 pin not much works so im pretty stuck guess i best get saving and see if i can get a new pc and soem point,.

[Rik]

Try a new PSU, that will eliminate every else, or not.

[martin_uk1]

Ill take mine to the pc shop tommorrow and see what they say if they say the psu ill buy one if not i think ill have to get a new pc lol..

[Rik]

I'd see what salvageable components there are first, Martin. A new mobo would be cheaper than a complete new machine. OTOH, if you want me to give you a reason to spend money, I can be very persuasive. 

[martin_uk1]

i think my phenom is ok i think my ram is alright as i got 7 gigs i have a 8800gts 640 meg ddr3 too with 500 gig hdd i need to know what mobo i can get as i have limited funds upto around 40 quid i dare to say..

[Glenn]

Martin,

Write down here, each step that you have done, that way it is easier for people to try to help.

You replaced the HDU, then the PC did not perform a POST check or boot correct?

What did you do next?

[martin_uk1]

machine was in bits in the case side i removed the hdd and replaced with other then i tried booting it and it fired up and nothing happened then i turned it off and on and then it dident do anything no sounds or beeps it would not do a thing i took everything off mobo and replaced them 1 by 1 and nothing still i took out the 4 pin 12 volt connector and the processor fan would spin but nothing else would work at all when connector put back in nothing happens just the light flickers on the fan thats it..

[Rik]

So is it possible something on the mobo shorted to earth, Martin?

[martin_uk1]

Getting to sound like it aint it any ideas on the mobo front for a phenom 9650 for around 40 quid as i have cash in paypal account.

[Rik]

Well, I'd still start by eliminating the PSU and decide what to do from there.

[martin_uk1]

well if it has earthed does that not mean that the mobo has died or would it blow the psu im not sure on some things i can fix and build pcs im just in alittle of a pickle on this one..

[Rik]

Do you have a reason to believe that the mobo may have shorted? OK, lowest cost approach would be to buy a meter and check the voltage from the PSU. If that's OK, a damaged mobo would seem to be more likely.