New build that refuses to power up

Flareon

Flareon

Flareon

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Joined
2 Dec 2003
Posts
400
Location
High Wycombe, UK
Right. Just got a load of new parts (almost entirely from OcUK) yesterday.

Got currently built:

DFI Lan Party LT X48-T2R Intel X48 (Socket 775) PCI-Express DDR2 Motherboard
Intel Core 2 Quad Pro Q6600 "Energy Efficient SLACR 95W Edition" 2.40GHz (1066FSB) - Retail
Corsair 4GB DDR2 XMS2 Dominator PC2-8500C5 TwinX (2x2GB) Supplied with Airflow Fan (TWIN2X4096-8500C5DF)
Tagan BZ 700W
BFG 8800GTX OC (from the old system)

CPU,Chipset and GPU are all watercooled, not that it makes any difference at this point.

Last night when finished building this, I couldn't get it to power up at all. Neither of the two standby LEDs on the T2R were lit.
I hotwired the PSU and all the other devices started up fine. At this point after 7 hours of working on it I went to bed :mad:

***

So this morning I've been working on it again. The same crap once again, but with some fiddling I managed to get the standby LEDs on and from that point it POSTed fine.
Then it stopped again. I haven't managed to get it tp POST once although it has come on fairly randomly for about 5-10 secs a few times.
Tried the old PSU (480W neopower) without any different effect. I've got only one stick of RAM in. Taking the 8800GTX out makes sod all different. The disks have been out for the last few hours and no other non essential devices are connected.
This effectively means that the only components that could be causing this issue are the motherboard CPU RAM or PSU. Since I've tried a different PSU, it seems unlikely to be that.

My money's on a DOA motherboard but I'd like some insight before I dismantle several hours' worth of watercooling work and build it benchtop as I have working spares of every component available to try.

Thanks in advance.
 
Typical... just went to try again for round 2 after posting this, and it's up.... going to start reconnecting devices now and I don't expect it to stay working for long, so still, any ideas please.
 
As expected. Got everything reconnected, went into BIOS and started setting stuff up and after about 2 minutes, poof!
Incidentally the last menu I visited was the hardware monitoring which reported 26C chipset and 21C CPU so it can't be badly fitted blocks...
 
When it boots, it boots fine but everything goes off after (insert amount of time >2mins).

The 26pin ATX is in securely as is the 8pin extra.
 
Sounds like somethings overheating to me even though you mentioned the temps (they could be wrong, or the sensors are wrong).

Did you try booting with just heatsinks & aircooling setup?

Flareon said:
When it boots, it boots fine but everything goes off after (insert amount of time >2mins).
Click to expand...

Yeah, this happened on a mates PC. It was definitely a badly fitted CPU HSF.
 
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Well now you say that, it isn't :)

Current status is that I leave it powered off at the mains, wait 1min> then power it back on again. I don't actually start the system but the standby LEDs come on for about 5-10secs then turn off.

Oh and if I'm gonna do an aircooling test it's no more difficult to take the entire thing apart really...
 
Had it all out, and there's no power to the motherboard with the PSU, motherboard and absolutely nothing else...

Oh and the old 2 way swap... old PSU makes no difference and the new PSU works fine on the old board.

RMA time.... :o
 
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