Faulty motherboard?

[fastxfurious]

hmm, i could actually test the psu on my brothers computer......i'm sure he wouldnt really mind...so i will do that tomorrow, and tell you what goes on. :]

[staffsMike]

Not a bad plan and building it outside the case (stick the mobo on the mobo box) should rule out any shorts.

[Thorsson]

Well I'd still like to know what the IP35-Pro is showing on the LED with everything connected... (i.e. 24 pin power, 8 pin 12V1, and the 12V Molex for PCI-E). And also what happens if you try it outside the case with only the CPU/HSF and 1 stick of RAM.

Then before deciding if it was the PSU or the mobo I would want to swap in a different PSU if possible (doesn't that mate have one?).

[fastxfurious]

when you say build it outside the case i get that etc, as i guess what im looking for is to check if the leds go off again? it wont be connected to the monitor when outside the case, correct? and not to the fans either, etc.

and thor, when its all connected theres a red power led on it, and when i turn it on the green comes on too. just it dips for a sec.

and trying the psu in my bro's comp, that aint dangerous is it? like it wont blow any of his components?

[staffsMike]

It won't blow anything up, well it shouldn't anyway

building it ouside means use it as ever you would, without the case being involved. You won't need case fans but leave the HSF on etc..

Connect up the keyboard and monitor etc.. and see if she runs. It's to eliminate shorts, might not come to anything but could be worth a shot.

[Thorsson]

I was thinking of the LED boot codes. If you watch as it boots, what's the number it reaches before rebooting?

Note that in a minimal boot you don't need the video card in, let alone connected to the monitor. You should be able to tell whether it's booting or not. With the IP35-Pro you don't even need RAM because you can tell by the error code if it was a RAM error (which it should be as you don't have any at this point) or something else. Then we know PSU, mobo or CPU, and if you try the PSU in another machine we can discount that (or not).

If the above is what happens (i.e. we can narrow it down to CPU or mobo) I would suggest taking the HSF off, checking that there's no bent pins, putting it back in carefully, cleaning it off, following the AS website's method for thermal paste, and then making sure that the HSF is fitting firmly but without too much force. If it still doesn't boot I'd RMA both.

[fastxfurious]

right....an update!

i just took mobo out, and placed it on the stuff it came on, that non conductive stuff.

what i left in/on; cpu, heatsink, power supply (24 pin + 8 pin)

with 8 pin left in, this is what the post code shows (i will try to explain the best i can);

start at 01....when power on, goes through this sequence very quickly - 8.3 (atx power supply ready), 9.8 (de-assert atx power supply), 9.9 (complete power off sequence).

it then repeats this ever 3 seconds (the power only stays on fo 1 sec).

without the 8 pin atx; 8.7 all the way (check cpu power voltage) - goes to 8.8 v quick at the end for like 1 millsecond before going back to 8.7

considering there's only these 3 components in, surely it must be the psu? i am gonna try it in my bro's comp tomorrow.

but yeah., that's where i have got now

[Thorsson]

Something's causing it to power down. Can't see how the PSU would do that - it's clearly delivering enough power to start the boot. I've never seen this behaviour before.

[fastxfurious]

hmm really?

those 2 threads that someone posted said the same thing about an antec psu, didn't they? although a different psu, it sounds the same?

i guess it cant run w/o the heatsink + processor aye? so i'm just gonna have to try psu on diff comp.

also - can i use the cpu from my old pc in there? (it should be ok, yes? since the psu blew up yeah, but the proccy should be intact ye? and if i do use it, do i have to use the heatsink off it too, even just for these tests?)

[sleepyhead]

Not to sound like a numb nuts but is the cpu HSF fan plugged in the right connector? I believe my FP-IN9 BIOS default setup is to shut down if cpu fan fail. That may or may not cause this, just a shot in the dark...

[staffsMike]

If it was that is the most painfully funny thing ever.

Asus tend to give you an on screen warning, never had the problem with Abit.

[fastxfurious]

hehe, nope, i don't think ;o

it's plugged into 'cpufan1' so i would hope that's the right one hehe, and it turns around so ya know

[sleepyhead]

If it was that is the most painfully funny thing ever.

Asus tend to give you an on screen warning, never had the problem with Abit.

hehe, nope, i don't think ;o

it's plugged into 'cpufan1' so i would hope that's the right one hehe, and it turns around so ya know

OK, so I was wrong in my guess this time Just thinking from a "back to basics" point of view.

Just to keep the train of thought going, are all 4 wires plugged into the mobo correctly working? IE is the RPM speed being fed to the mobo?

If you have an old CPU, you can try it out and boot up to see what BIOS revision number you are at.

[fastxfurious]

well, if i could get to this bios screen that would be a start ^^

and what do you mean by the 4 wires?

[Thorsson]

I've not seen it. But there have been some reports of people having problems with various power supplies. Not seen a Corsair mentioned, but then I have seen an Infiniti mentioned, but mine has no problems whatsoever.

You may just have a touchy board. Did you get PSU/CPU/Mobo from the same place?

[BUFF]

start at 01....when power on, goes through this sequence very quickly - 8.3 (atx power supply ready), 9.8 (de-assert atx power supply), 9.9 (complete power off sequence).

suggests PSU to me.