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Computer help needed please read on.

generaloneill Avatar
6y, 10m agoPosted 6 years, 10 months ago
Ok, I have the following motherboard to diagnose for a friend.

http://www.asrock.com/MB/overview.asp?Model=939NF6G-VSTA

Now I stripped it down and found the power supply unit had completely burned out. So I put my own PSU in it, and the power light came on , noises from hard drive, cd open tray and lights all working ok. However no output from the monitor. Monitor is not the issue as this is the one im using with my own setup.

The fan is spinning ok, to rule out the graphics port, I put in the working PCI express graphics card from my own PC, which did not work on the faulty system.

How do I know if it is the processor or the motherboard, or even both that I need to replace? There are no noises coming from the motherboard, i thought there was usually error beeps, but I am getting none of them.

Any advice or tips would be welcomed, thanks.
generaloneill Avatar
6y, 10m agoPosted 6 years, 10 months ago
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banned#1
it would fire up the screen from bios without a processor im sure
at least something would
#2
Im afraid to try it,lol, wouldnt it melt the processor mount or something?
#3
Have you connected the 4 pin power connector up?
#4
Yes, and the 14 pin one, I even tried it with and without the 4 pin connector to see if it made any difference, and it didnt.
#5
14 pin?

That link you gave says you should have a 20 pin connector and then to the right of that on the edge of the board a 4 pin connector.
#6
have you cleared CMOS checked RAM is seated correctly as well as any addon cards . is it 20+4 pin psu cable.

Edit you have to use the 4 pin as well as normal psu 20 pin
#7
yeah sorry, meant 20 pin, seated correctly, as is the 4 pin one, as is the memory (removed and replaced).

If the processor wasnt working would the power go to the drives and the fans? It is btw, just nothing happening with the graphics.
#8
generaloneill
yeah sorry, meant 20 pin, seated correctly, as is the 4 pin one, as is the memory (removed and replaced).

If the processor wasnt working would the power go to the drives and the fans? It is btw, just nothing happening with the graphics.


usign which adapter VGA / dvi which gfx obnboard or addon as that mobo has some dual monitor capabilities accessed via maybe keyboard selection like a kvm switch with 2 monitors would be used. dunno look at manual (probs refers to OS though)

Have you cleared the CMOS though by pulling power cable out then removing the jumper from the clear cmos pins 1-2 to placing on 2-3 for about 5 -20 seconds then putting back to pins 1-2 then trying to power on get into Bios to set it back up etc.
#9
most likely the processor been through exactly same process.

i thought it was motherboard bought a new motherboard still same problem then bought a new processor and tried on old motherboard and worked perfectly.

i used a processor tester too which is when i found out my processor was faulty
#10
dontasciime
usign which adapter VGA / dvi which gfx obnboard or addon as that mobo has some dual monitor capabilities accessed via maybe keyboard selection like a kvm switch with 2 monitors would be used. dunno look at manual (probs refers to OS though)

Have you cleared the CMOS though by pulling power cable out then removing the jumper from the clear cmos pins 1-2 to placing on 2-3 for about 5 -20 seconds then putting back to pins 1-2 then trying to power on get into Bios to set it back up etc.


Onboard graphics via vga direct in the back, and did reseat the jumper from 1-2 to 2-3, no change.

Id get a new motherboard and processor, however I dont want to throw away a perfectly good processor if it works. Cant find many reasonable priced 939 motherboards.
#11
Does sound like a system board fault, processors rarely fail. Could also be your RAM though. Try some different DIMMs first
#12
Is this system using more than one dimm of memory? For troubleshooting purpose you want to try to get the motherboard to post/beep, so should be using as little hardware as possible with nothing but the board hooked up. So disconnect all the drives and such, just wire up the mobo, 1 stick of memory, CPU and go from there. Changing the memory first, then changing which slot you are putting it in etc.

Pain in bottom without another board to test the hardware on though.

Also bare in mind when you are doing any of this, remove the kettle plug from the PSU first. If you trip the board they sometimes go into a dead state where they don't post at all until all power has been disconnected from the board for several minutes and they have reset (removing all cables hooked up to the mobo and leaving it alone for 10 mins should clear it).
#13
tallpete33
Does sound like a system board fault, processors rarely fail. Could also be your RAM though. Try some different DIMMs first


Just checking the memory now.
#14
tallpete33
Does sound like a system board fault, processors rarely fail. Could also be your RAM though. Try some different DIMMs first


no wouldn't say so because he said he using his motherboard and not his friends but is still failing but could be ram
#15
aamir007
no wouldn't say so because he said he using his motherboard and not his friends but is still failing but could be ram


Im not using my motherboard, I transferred my psu into my friends pc.

My motherboard is a diff socket hence why I cant test the processor.
#16
generaloneill
Im not using my motherboard, I transferred my psu into my friends pc.

My motherboard is a diff socket hence why I cant test the processor.


oh then could be motherboard too but if it was motherboard would most likely wouldn't turn on.

in my opinion and experience its the processors in this case

try getting hold of a different motherboard with the same socket or a processor of the same socket

have you tried different ram

and does anything come on the screen motherboard logo or bios
#17
aamir007
oh then could be motherboard too but if it was motherboard would most likely wouldn't turn on.

in my opinion and experience its the processors in this case

try getting hold of a different motherboard with the same socket or a processor of the same socket

have you tried different ram

and does anything come on the screen motherboard logo or bios


Nothing at all comes up.

I wouldnt normally suspect the mobo, however, the usb ports have a couple of dodgy sockets.
#18
you would need to get hold of same socket processor or mobo to find out what is wrong

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