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#1 |
New Member
Join Date: Jan 2019
City & State: Rochester, NY
My Country: USA
I'm a: Knowledge Seeker
Posts: 5
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![]() I spent the past couple days working on a full recap of this A8N-SLI Premium v1.02. The board only had a few bad caps when I started, and it worked fine, but I figured I'd replace everything rather than have to repeatedly pull the board every time one goes bad.
I made a cheat sheet with locations and capacitor info, then ordered caps from DigiKey; everything Panasonic except for the 10uF caps, which are Nichicon. When I finally got everything back together (Just the board, PSU, and PCI video card hooked to a monitor), the board wouldn't POST. The board gets power, but, when I push the power button, the CPU fan would spin, but then stop about half a second later. Pressing the power button again immediately after didn't have any effect. I tried again later, and several caps (specifically PCE1, PCE4, PCE10, and PCE9) exploded in sequence like firecrackers before I could flip the PSU power off. In addition, CE8 is now bulging. I'm not entirely sure what I did wrong (aside from powering the board again). I used a desoldering gun to make easy work of the caps, and I made sure to install every cap in the correct orientation. Could I have damaged any components heating the board with either my iron or my desoldering gun? Did I buy the wrong replacement caps? What am I missing? |
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#2 |
Badcaps Veteran
Join Date: Jan 2015
City & State: worcester
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 1,648
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![]() missing pictures .
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#3 |
New Member
Join Date: Jan 2019
City & State: Rochester, NY
My Country: USA
I'm a: Knowledge Seeker
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![]() Oops. Photos here: https://drive.google.com/open?id=1NE...fOIWjZWEHNYeem
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#4 |
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Join Date: Nov 2011
City & State: CA.
My Country: USA.
Line Voltage: 120-125VAC 60Hz.
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Posts: 1,211
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![]() So, it looks as though you installed the replacement caps backwards (several have vented).
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#5 |
New Member
Join Date: Jan 2019
City & State: Rochester, NY
My Country: USA
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![]() Thank you for pointing that out. Hopefully it just boots after I get replacement replacements and get everything swapped around.
Is this just something Asus does to be different? My understanding was that the shaded portions correspond to negative, and thus the stripe. |
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#6 |
Badcaps Veteran
Join Date: Jan 2010
City & State: OK
My Country: USA
I'm a: Professional Tech
Posts: 1,525
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![]() Oh No! Possibly another ASUS motherboard that wont post and for parts only on Ebay again.
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#7 | |
New Member
Join Date: Jan 2019
City & State: Rochester, NY
My Country: USA
I'm a: Knowledge Seeker
Posts: 5
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![]() Quote:
![]() After reorienting the good caps and replacing the bad ones, the board boots fine, and it survived 9 passes of memtest overnight. |
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#8 |
New Member
Join Date: May 2009
Posts: 13
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![]() I might be wrong, but I wouldn't trust any cap that was reverse-biased for any length of time.
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#9 | |||
Badcaps Veteran
Join Date: May 2008
City & State: VA (NoVA)
My Country: U.S.A.
Line Voltage: 120 VAC, 60 Hz
I'm a: Hobbyist Tech
Posts: 8,687
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![]() Quote:
![]() Older ASUS-made AsRock boards, as well as Pegatron are like that too. Now the funny thing is, I have recapped so many ASUS boards in the past that sometimes I almost install caps "in backwards" on normal boards. ![]() Quote:
![]() Quote:
![]() Good to hear its working again! I agree. Though it depends on where the cap was located. In any case, I'd replace all caps again on the important rails, just to make sure. Last edited by momaka; 02-01-2019 at 09:54 PM.. |
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