Is it PSU or Motherboard

rayer

rayer

rayer

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Suddenly my PC died, I pressed the power button, nothing. After giving it a rest, i tried again and it powered up. After 2 mins though, it died again. Now it will not start.
I have had this type of problem before, and it was the motherboard. So naturally this time I purchase another board.
After installing the board, I turn it on and the case fans and CPU fans start to turn for about half a second. Then dies.
This happens everytime I turn the PC on after giving it a 30 sec rest.
Would I be right in thinking this is the PSU this time (350W about 3 years old).

Another thing is on my old board, I had the main power plug socket and also another small square 4 pin plug next to it which I think also supplied power ??? This small 4 pin square plug has nothing to plug into on this new board as the socket is not on the board, could this be involved ???
 
2600 XP, 1 gig ram, 80gb HDD Old board was a PC chips new one is a ASRock K7S41GX.
Seems power get to the board for a split second, then dies.
 
The PSU is a Premier LC-B350ATX. I have tested by removing RAM, GFX card, no IDE connections and I always get the same results.
All the fans in the case just do one revolution turn and thats it, no beeps or power ups ??
 
Only thing I can imagine it would be is either motherboard or power, either way the motherboard isn't getting power and that's cause by either of the aforesaid. If you've replaced the motherboard and basically had that power supply on both motherboards and it will not start, then chances are it's going to be a dead PSU.

If you have a multimeter in the house, I would recommend testing the PSU with it and see if you get numbers or nothing.
 
I just spoken to a guy, and he said that the 20pin power plug should obviously be connected to the motherboard AND the 4 pin power plug for the processor ?? Now on the PC Chips board I had a place to plug this into, but not on this new board ????
 
rayer said:
I just spoken to a guy, and he said that the 20pin power plug should obviously be connected to the motherboard AND the 4 pin power plug for the processor ?? Now on the PC Chips board I had a place to plug this into, but not on this new board ????
Click to expand...
Do you have an 8-pin connector instead of the 4-pin or nothing at all other than the 20pin ATX? Some boards have an 8 pin connector I think, such as a 650i Ultra whereas my motherboard is only 4 pin.
 
Nope, only a 20 pin. I have noticed that the manual says the board runs the memory at
PC2700 (DDR333) / PC2100 (DDR266) and I have a PC3200 DDR 400 in it. I cant imagine that effecting it as it will only travel the speed of the board wont it ?
 
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