PSU

  • Thread starter Thread starter Tenshodman
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Tenshodman

Whilst on PSU's I purchased a new Thermaltake 430 watt PSU as I was worried
my old one was getting a bit iffy. The old PSU is a no names 350 unit.
After replacing the PSU the system will not boot up properly sometimes even
the AGP card will only boot up to 120 out of the total 128 MB. Sometimes it
will boot up a bit further into the MB but then stops. The new PSU is a
switched one opposed to the old one. The MB is an ATX type with 1G P111 on
board. Any suggestions as to what could be wrong. I double checked all the
connection and yes the old PSU does have the extra 4 connection pin for a P4
but it is not used.

Cheers

Rod Gayford
 
Check all the connections on the motherboard. It is common when replacing a
PSU for other connections (e.g. drive cables, DIMMS, PCI cards) to get
knocked. Make sure everything is seated properly.
 
Solved the problem. The PSU was slightly wider than the old PSU due to the
additional fan and the new PSU was actually touching the heatsink on the
CPU. Once I changed the fan and heat sink and put a bit of plastic between
it and the PSU the whole thing is working OK. Any ideas why the PSU touching
the CPU heatsink would do this? Its a full height desk top case.

Cheers

Rod Gayford
 
Attaching a smaller heatsink/fan assembly onto your CPU may not prove to be
your best idea so far.. look at buying a case that will give you more
space..
 
I would suspect a grounding problem. Something may be wrong with the PSU,
the PSU connection to the motherboard, or the motherboard itself. It sounds
like a poorly designed case if the CPU has that little clearance with the
PSU.
 
Ground current loop between CPU/Heatsink assembly or Heatsink/CPU became
slightly dislodged from socket.

JS
 
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