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PSU caught fire. - Page 3

post #21 of 98
Thread Starter 
Quote:
Originally Posted by latelesley View Post

ouch! You basically created a short circuit by doing that! Now with any luck, all you've taken out is the system fan header.

Both the fan header, and the Floppy connetor are power outputs, and not the same wiring setup, so when you've plugged the floppy power into the fan header, it's probably shorted the 12V to ground.

.FIRST RULE OF BUILDING A PC - Every connector on the PSU / Motherboard does NOT need to be connected

Let me repeat that - Every coneector on the PSU / Motherboard does NOT need to be connected.

right on to what you can do next - you've probably toasted the system fan header - you can try a 3 pin fan on it, but it is doubtful it'll work. If it does, you are lucky.

The molex's you plugged together are fine - the two wire fan only needs the 12V power, thats why it only uses 2 connections - 12V and GND. the PSU molex has 4 wires for providing 12V (Yellow),GND (Black),GND (Black), 5V (red) - so the fan is only using the 12V and one GND for a complete 12V circuit. It was fine.

The mistake was the urge to plug EVERYTHING together - and you've basically killed the floppy connector. Does it have the 4 wires running up to the molex? And is the 12v (yellow lead) only burnet up to the molex connector? If so, I'd get snips, and just cut each of the 4 wires that go to the floppy connector - cut them right up beside the molex, being careful not to cut the cables between the molex and PSU. and make sure theres no exposed copper touching - use some electrical tape to cover the snipped wires INDIVIDUALLY.

If you do that, and it fires up (oops! not literally,no pun intended), you have been VERY lucky.

Worst case scenario could have been a fried board AND PSU.

this eases my pain a little bit. redface.gif

I can live with 2 component failures but would just never try again if every component fails.

And yes, only the yellow lead (from the molex to the floppy power) burnt. Every other cable is fine. So in the future, I just connect the 2 pin fan connector to the 4 hole molex and thats it? So simple and I've gone and over complicated it by so much.
post #22 of 98
Thread Starter 
Quote:
Originally Posted by shilka View Post

Buy something better this time dont cheap out and buy something crappy

Yeah learnt that lesson the hard way. frown.gif
Quote:
Originally Posted by Syan48306 View Post

You said the system started up just fine. Does that mean the PSU was powering the system when you started it up? If everything runs, then I'd just ignore everything and use it as it is.

I once had an issue where one of my fans punctured a fan cable when I wasn't paying attention installing the fan. The screw grounded the fan to the case. When I powered it up, It short circuited the molex cable and it caught on fire. Luckily the extreme heat severed the cable. The PSU was fine in my case and I found the issue was it was grounded to the case. After fixing that, I didn't have any more issues.

If there are no "apparent" issues, besides you melting one of the cables, I'd just pretend that it never happened. Check if the fan header still works on the motherboard. If it does, then the motherboard should be fine. If the PSU powers the system, then you're golden.

Yep, the PSU was doing its job and the system actually booted up with all connected fans on. But the floppy power was its downfall and short circuited and caught fire.

I'm going to try a new psu tomorrow and hopefully it works.
post #23 of 98
Im guessing he connected his fan molex to the floppy disk molex and then plugged the floppy molex into his motherboard fan header, all the while the molex cables are plugged into psu via power cable?

Sorry im really tired today tongue.gif
post #24 of 98
Thread Starter 
Quote:
Originally Posted by $ilent View Post

Eh so how did he connect one of his fans to this?

2 pin fan connector was plugged into molex, the floppy power was running off that molex.
post #25 of 98
If you feel lucky you can use the same powersupply and try to power the pc. the only thing that burned as you said was the floppy connector. its possible the PSU is still good(well... working)
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post #26 of 98
Quote:
Originally Posted by asfrn View Post

2 pin fan connector was plugged into molex, the floppy power was running off that molex.

Then you plugged that into your motherboard?
post #27 of 98
Quote:
Originally Posted by asfrn View Post

this eases my pain a little bit. redface.gif

I can live with 2 component failures but would just never try again if every component fails.

And yes, only the yellow lead (from the molex to the floppy power) burnt. Every other cable is fine. So in the future, I just connect the 2 pin fan connector to the 4 hole molex and thats it? So simple and I've gone and over complicated it by so much.

Yeah, just connect the molex of the fan, to the molex on the PSU - thats it. And if the yellow wire is only damaged from the molex to the floppy connector, i'd get all choppy on the floppy connector wires, and just cut the connector off, taking the bad wire out the equation. Consider it your first "Mod" biggrin.gif
post #28 of 98
Thread Starter 
Quote:
Originally Posted by kill View Post

If you feel lucky you can use the same powersupply and try to power the pc. the only thing that burned as you said was the floppy connector. its possible the PSU is still good(well... working)

Don't have it in me to risk the same psu tbh. Things could go worse and my luck isnt the best.
Quote:
Originally Posted by $ilent View Post

Then you plugged that into your motherboard?

yeah, the floppy disk power was plugged into the fan header. The yellow cable leading between that and the 4 pin/hole molex burnt. http://i.imgur.com/0KyYQaqh.jpg

Thats the only visible damage I can see
post #29 of 98
Thread Starter 
Quote:
Originally Posted by latelesley View Post

Yeah, just connect the molex of the fan, to the molex on the PSU - thats it. And if the yellow wire is only damaged from the molex to the floppy connector, i'd get all choppy on the floppy connector wires, and just cut the connector off, taking the bad wire out the equation. Consider it your first "Mod" biggrin.gif

Oh I think todays events prove that I should stay away from any mods what so ever and stick to what I'm supposed to do. redface.gif
post #30 of 98
Damm...what are the specs of your rig? Aside from PSU.
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