No power at all!

Mike S

Mike S

Mike S

Associate
Joined
29 Sep 2006
Posts
8
Right, to cut a long story short, whilst waiting the next gen of GPU's I thought I'd tide myself over by adding a second 5870 to my system...

Turns out I didn;t have enough PCI-E connectors nor, probably, power on my current 650W PSU so I bought an 850W Corsair with the required number of connectors.

So I lay out the PC on a desk, remove the old PSU, plug in the new. Check everything is seated correctly, power on. And nothing, no lights on the mobo, no PSU noise, nothing.

I triple check all is connected. It is. I try again and the same result. So I suspect a failed PSU.

Which is annoying but not the end of the world. So I unplug the second 5870 and reconnect the old PSU, check all connectors again and get the same total lack of repsonse. Which is now a bit of a concern...

I have no idea what I could have omitted, or how a critical component could fail during a simple power unit swap out. I've tried different power cables and different wall sockets to no avail. I've checked all components and all connecitons are firmly seated and now have no idea what to try next..

Any help will be much appreciated although I'll not be able to implement any advice offered until I get back to the PC on Thursday..

Thanks!

Mike
 
Yes, all connected, but I'm sure in the past when I've omitted the 8pin CPU cable I still had some life in the mobo even if it wouldn't actually boot. But all is connected this time...

It's very frustrating as it is/was a very simple upgrade...
 
Do you have any form of led or indicator on your motherboard to show you have power? Same question about the power supply? Also were you wearing an ESD strap when you made the swap? I know it is a reaaaaaaaly long shot but is it possible you fried the motherboard somehow? You would have to be the unluckiest bloke ever for that to happen while swapping a psu though.
 
There is/was an LED on the motherboard which happily glowed when the system was on standby (IIRC). This is no longer the case...

I wasn;t wearing an ESD strap but, ha grounded myself before handling the PC and was pretty careful to touch nothing other than the cables I was plugging in and out. That said, I am starting to think the motherboard died on the operating table as two dead PSU's is beyond unlikely especially as one was definitely working prior to the swap.

I will try that pape clip trick when I get home though.

Thanks for the advice.
 
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