Think I've got a fault with basic pc i am using, sometimes will not boot, if i take power lead out and press in power on button for 10-30 seconds system works fine,

have re-seated everything , still happens, narrowed it down to psu or mobo,

anybody got a dell psu

hp-p1457f3 kicking around its from a dimension lxxxxr

jase

 

have you checked the voltages for +/-12, 5 and 3.3V in your BIOS? are they low? Is the system going into standby and then not powering out of it? check power/wake up settings in your BIOS.

 

once system is on its fine can re-start etc etc all day

its only once it has been powered down fully and left you hit the on button and zero no boot no fire up dead

 

so, like you said, you take out the power lead and then (after putting it back in) it powers up fine?

What setting has the power button got in the bios? sounds silly, but mine has about 4 different power up/down states.

 

don't know off-hand but system is set to defaults, using the option in bios

jase

 

have you been messing with leads inside the case?

 

yes but i've done stuff like this before in my sleep, have built, rebuilt etc etc etc , i've built 5 pc's this week fine , just this one playing up been onto dell and they said try the re-seat everything routine, done that, but system still does it,

 

dodgy power lead?

 

tried that one

 

Maybe a dodgy power switch - Dell have those fiddly little micro-switches under the button.
They also have a green bulb inside which goes out once the power's drained totally, so see if it boots consitently once the lights gone out. Probably a psu - but it'll cos ya £100 to find out if you don't have spares around.

 

what Spec DELL Machine is it?

 

dell dimension lxxxr system

running a p3 gig, 512mb ram geoforce 2pci, sblive 5.1

jase