Asus P5KPL blown capacitor

crozoki · 04-16-2015, 09:33 AM

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 · 04-16-2015, 10:03 AM

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 · 04-16-2015, 10:15 AM

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

**selldoor** · 04-16-2015, 11:34 AM

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** · 04-16-2015, 03:29 PM

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

**Agent24** · 04-16-2015, 05:06 PM

Quote:

Originally Posted by selldoor

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!** · 05-07-2015, 01:46 AM

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** · 05-07-2015, 01:53 AM

Quote:

Originally Posted by kevin!

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** · 05-07-2015, 07:13 AM

Quote:

Originally Posted by Agent24

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 · 08-31-2016, 08:18 AM

always take photo for ref

mikail13 · 09-02-2016, 02:11 PM

always

round hole is negative.
square hole is positive

**bianchi77** · 09-02-2016, 11:18 PM

Quote:

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 · 09-09-2016, 05:21 PM

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** · 09-09-2016, 08:11 PM

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...

04-16-2015, 10:03 AM	#2
crozoki Member Join Date: Feb 2013 City & State: Croatia My Country: Croatia Line Voltage: 230VAC 50Hz I'm a: Knowledge Seeker Posts: 25	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??

04-16-2015, 10:15 AM	#3
crozoki Member Join Date: Feb 2013 City & State: Croatia My Country: Croatia Line Voltage: 230VAC 50Hz I'm a: Knowledge Seeker Posts: 25	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.

04-16-2015, 11:34 AM	#4
selldoor Slow Learner Join Date: Dec 2010 City & State: Lancashire UK Posts: 7,853	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 __________________ Please upload pictures using attachment function when ask for help on the repair http://www.badcaps.net/forum/showthread.php?t=39740

04-16-2015, 03:29 PM	#5
c_hegge Badcaps Veteran Join Date: Sep 2009 City & State: North Coast, NSW My Country: Australia Line Voltage: 240V 50Hz I'm a: Professional Tech Posts: 5,052	Re: Asus P5KPL blown capacitor Yup. I've done that plenty of times with ASUS boards. All the more reason I hate them. __________________ I love putting bad caps and flat batteries in fire and watching them explode!! No wonder it doesn't work! You installed the jumper wires backwards Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 Pro

05-07-2015, 01:46 AM	#7
kevin! recapping PCB. Join Date: Jul 2013 City & State: Gerona My Country: España Line Voltage: 230VAC 49Hz, 2 Ph I'm a: Hobbyist Tech Posts: 175	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 __________________ Gaming pc: Gigabyte GTX760, Corsair RM750I. HTPC: PSU Corsair TX650M nVidia gt1030 Workshop PC: nVidia GT520+Intel HD triple monitor.

08-31-2016, 08:18 AM	#10
phill5252 New Member Join Date: Feb 2010 City & State: australia Posts: 8	Re: Asus P5KPL blown capacitor always take photo for ref

09-02-2016, 02:11 PM	#11
mikail13 Member Join Date: Aug 2013 City & State: istanbul My Country: Turkiye I'm a: Knowledge Seeker Posts: 69	Re: Asus P5KPL blown capacitor always round hole is negative. square hole is positive

09-09-2016, 05:21 PM	#13
euromatlox Member Join Date: Mar 2013 City & State: Lempaala My Country: Finland I'm a: Knowledge Seeker Posts: 59	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. Last edited by euromatlox; 09-09-2016 at 05:25 PM..

09-09-2016, 08:11 PM	#14
RJARRRPCGP Badcaps Veteran Join Date: Jul 2004 City & State: North Springfield, Vermont My Country: USA Line Voltage: 118-127V 59-63.5 Hz-> actualizo: pérdido de voltaje I'm a: Knowledge Seeker Posts: 5,791	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... __________________ MSI B450 Tomahawk Ryzen 7 "Matisse" 3700X 16 GB Corsair Vengeance LPX DDR4 SDRAM MSI Gaming X Radeon RX5600XT eVGA Supernova G3 750W Samsung 970 Pro 512 GB NVMe SSD "¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr"!" -mí mismo "There's nothing more unattractive than a chick smoking a cigarette" -Topcat "Today's lesson in pissivity comes in the form of a ziplock baggie full of GPU extension brackets & hardware that for the last ~3 years have been on my bench, always in my way, getting moved around constantly....and yesterday I found myself in need of them....and the bastards are now nowhere to be found! Motherfracker!!" -Topcat "did I see a chair fly? I think I did! Time for popcorn!" -ratdude747 Last edited by RJARRRPCGP; 09-09-2016 at 08:15 PM..