Specific Caps Keeps Venting

[brassicGamer]

Hi all. So I've got this neat motherboard. It's an HP version of the Asus TR-DLS, included in the tc3100 server. It was working perfectly fine last time I used it, which was about 4 years ago. It has been in dry storage since and was in perfect cosmetic condition...

...except: three of the large caps near the CPU had randomly fallen out. This was due to weak solder joints as I was able to remove another one with very little force. After redoing all the joints for the related caps (competently - no shorts, etc.) and powering up the board, it ran for 2 seconds before one of the caps vented and the board shut down. I thought this was due to physical damage to the cap, so I replaced it. I didn't have an exact match (Rubycon 1200uF, 12V) so I replaced it with something close (Rubycon 1500uF, 12V) and the exact same thing happened.

Am I right in thinking that this suggests something else is damaged and too much voltage / too many amps are going through the cap in question? I can't see any physical damage, so I'm not really sure where to start. Any help would be gladly appreciated, as this is my dual Tualatin board. Many thanks.

[piernov]

Re: Specific Caps Keeps Venting

Make sure you oriented them as originally. On most Asus/Pegatron boards the marking for capacitor polarity is reversed.
Also cap should be 16V not 12V if it's on the VRM input.

[brassicGamer]

Re: Specific Caps Keeps Venting

Make sure you oriented them as originally. On most Asus/Pegatron boards the marking for capacitor polarity is reversed.
Also cap should be 16V not 12V if it's on the VRM input.

Wow. Thank you. I checked old photos and can confirm the markings are the problem. I hope more damage hasn't been caused. I double-checked and it's definitely 16V btw.