Asus P5KPL blown capacitor

[crozoki]

Hello.
I have a Asus P5Q motherboard. I replaced all the capacitors. motherboard will not boot. just a little shook fans. I disconnected 12v rail. motherboard lights up, the fans are spinning. but I almost immediately exploded capacitor 470uF next graphic slots. are something shorted near that capacitor?

[crozoki]

Re: Asus P5KPL blown capacitor

I have read in the forum and I quote "Be careful of polarity, Asus puts capacitors the other way around, the filled section on the pcb is the positive side of capacitors". Perhaps because of this??

[crozoki]

Re: Asus P5KPL blown capacitor

I looked at an old Asus board. I turned them wrong. Tell you whether it works when I replace them again.

[selldoor]

Re: Asus P5KPL blown capacitor

unfortunately turning them may not be enough.
You should really replace with new as they may be damaged.
If one exploded think how damaged the others might be

[c_hegge]

Re: Asus P5KPL blown capacitor

Yup. I've done that plenty of times with ASUS boards. All the more reason I hate them.

[Agent24]

Re: Asus P5KPL blown capacitor

unfortunately turning them may not be enough.
You should really replace with new as they may be damaged.
If one exploded think how damaged the others might be

x2

[kevin!]

Re: Asus P5KPL blown capacitor

I give you a little advice for when you go to welding capacitors, when you have the condenser outside, you take a multimeter, you put it in continuity, put the negative cable to the negative connector ATX 20-pin, and then looking for continuity in the negative condenser, if a continuation that is the negative pole.
I always do when I go to if welding a capacitor, whether saving me from future problems.
(Sorry my bad english)
Bye

[Agent24]

Re: Asus P5KPL blown capacitor

I give you a little advice for when you go to welding capacitors, when you have the condenser outside, you take a multimeter, you put it in continuity, put the negative cable to the negative connector ATX 20-pin, and then looking for continuity in the negative condenser, if a continuation that is the negative pole.
I always do when I go to if welding a capacitor, whether saving me from future problems.
(Sorry my bad english)
Bye

Good tip!

[ben7]

Re: Asus P5KPL blown capacitor

Good tip!

Mhmm, indeed!

Also, when you desolder a capacitor and replace it, you can have the board sitting so the negative faces in one direction, like, to the right, for example - so you will know which way to put the new one in. Of course, if you forget which direction is the negative ... well, yeah. Just check to see which pin is which with the multimeter like kevin! said.

Also, you can take a few pictures of the board before you re-cap it
That way you can look back and see which caps are connected which way. And possibly even which value of caps go in which spots.

[phill5252]

Re: Asus P5KPL blown capacitor

always take photo for ref

[mikail13]

Re: Asus P5KPL blown capacitor

always

round hole is negative.
square hole is positive

[bianchi77]

Re: Asus P5KPL blown capacitor

I give you a little advice for when you go to welding capacitors, when you have the condenser outside, you take a multimeter, you put it in continuity, put the negative cable to the negative connector ATX 20-pin, and then looking for continuity in the negative condenser, if a continuation that is the negative pole.
I always do when I go to if welding a capacitor, whether saving me from future problems.
(Sorry my bad english)

Good tip !

[euromatlox]

Re: Asus P5KPL blown capacitor

Always look which way old capacitors are mounted in motherboard. Just recently replaced some caps in Asus P5K and when reapplied power they immediately blowed. I took a closer look, and also searched some info from internet too - it seams that in many asus boards + and - pcb markings are wrong way. I can confirm this as I compared P5K with another (older) motherboard. Then I just replaced the blown caps with new ones, soldered them 'wrong way', and P5K worked again!

So it's important to check how the capacitor is mounted, not to trust on pcb markings.

[RJARRRPCGP]

Re: Asus P5KPL blown capacitor

P5Qs rarely had KZGs! Only some lower versions would, if they even did, IIRC...

They are almost always Fujitsu/FPCAP

While OTOH, Foxconn OEM motherboards for Dell usually has KZGs...

And the OEM for Acer, which appears to be ECS, probably uses both TK and Chemi-Con KZGs...