Well the simple swapout of one supply for a larger model when adding new drives shouldn't have seen any problems since everything was running ideal only moments earlier before shutting down. Once the usual esd precautions were taken it was the unplugging of one for the plugin of the other. With everything set.... nothing?
The verfication on all connections was made. The two PCI-E 6pin plugs were set aside with the only four wire plug seeing it's way to the socket. But when nothing came up after an immediate look at all connections found nothing wrong until.......? verification of which way the plug was inserted clearly showed that the locking clip was over the tab. But the plug felt loose when simply touching it. That shouldn't be! was the next reaction. It looked down inplace correctly but seemed loose at the same time?
At this point the plug was finally pulled out and looked over along with the second look to see if it was cross wired? It wasn't. When replugging it back in and pressing the power button again suddenly you see the post screen and everything coming up including the "missing slave ide drive"? When now looking at that it seemed pushed in all the way. ddaaaatttt! wrong!
I put some pressure on that anyways and hooked everything back up to now see the system running 4-6C cooler with a larger supply in it? Well don't forget that was also the opportunity to use a can of air duster to blast the dust out of everything. Next the old supply gets a treat to that and gets stored away in an air tight plastic seal.
ONE FURTHER THOUGHT:
When seeing this one for the first time where it only takes one contact to be loose and apparently lifted up in the plug and then when the plug was later pressed down "light as a feather" until the retaining clip "clicked"! makes you wonder just how many have assumed that a new board was bad when everything else worked but the system simply wouldn't boot up? "BAD BOARD OR NEED TO REPLUG?" sums it up!
I've got something similar with an old Dell PSU - one of the pins on the ATX main is somewhat bent, and a real pain to fit in. If it wasn't a proprietary PSU, I would have replaced it by now.
You do have to be careful with these things - if the connector isn't securely in place an enormous amount of extra resistance can be created which can badly damage the connector on the board and/or on the PSU. I've had one PSU where pins 1 and 13 looked like they'd been through a fire. Wish I'd taken pictures of that before disposing of the PSU
Fortunately I simply shut the system down on the spot when not seeing the normal post screen come up. A loose contact inside the plug is possible there where when first pushing down, not slamming it in either, it was somehow moved up inside the plug itself. What first throws you off a little is the additional 6pin plug on the same run as the usual four wire 12v feed.
My first reaction to look to see if that wasn't an optional plug seen with the larger model to find that was the one with the proper plug on the end. When going to replug it in I simply used a finger tip lightly until the retainer made the "click" sound and was looking twice there to see the locking tab?
This was a first here not to see a system fire up normally! But no harm no foul since the supply has been doing quite well since that happened. You can also imagine the expression when the post screen then indicated that there was no ide slave? "now what?"!
While rearranging the drives to move the pair of i250gb ide drives up to the top bays the tug on the cable somehow pulled the middle connector out just enough for that not to work? One rule often advised is to double check all connections! ! It's certainly bound to happen to anyone at any time. I don't care how long you''ve been doing this you can still get tripped up by one simple thing. Or maybe I'm just going senile early? who knows!