The Hall of Shame - Badcaps Photo Montage

[timb0]

Re: The Hall of Shame - Badcaps Photo Montage

Wow, interesting that they all blow at the same time, thanks, will start a new post!

[Pentium4]

Re: The Hall of Shame - Badcaps Photo Montage

I know this isn't the greatest picture but this was the power supply from a Gateway 900G that wouldn't turn on. All the caps are Samxon GF series, I put a red dot on all the dead ones. I replaced ALL the caps with Panasonic FM and it's working great!

[Uranium-235]

Re: The Hall of Shame - Badcaps Photo Montage

looks like bad thermal design

[Pentium4]

Re: The Hall of Shame - Badcaps Photo Montage

How so?

[ben7]

Re: The Hall of Shame - Badcaps Photo Montage

How so?

The caps are right next to a heatsink.

[c_hegge]

Re: The Hall of Shame - Badcaps Photo Montage

They are samxon GF series, though, so it doesn't take a heat sink to kill them.

[mariushm]

Re: The Hall of Shame - Badcaps Photo Montage

A lot of switching regulators datasheets mention that the capacitors should be at most about 1 cm away from the chips, to keep the trace lengths small.
So often, they can't do much about it, the capacitors simply have to be that close to the chips (whatever they are) that's mounted on heatsink.

I'd say the problem is the layout... they could have tried to move the chip a bit to the left so that the heatsink could have some fins extending horizontally and dissipate the heat better. Problem is there also has to be a bit of distance from the inverters as 700v-1400v can arc over if you're not careful.

But... it was cheaper for them to use a simple bent bar..the extrusion process for fins on heatsinks is a bit more expensive.

[Pentium4]

Re: The Hall of Shame - Badcaps Photo Montage

DON capacitors from an Allied power supply. I'm going to recap it, then I'll post pics of them close up, they died so hard

[ben7]

Re: The Hall of Shame - Badcaps Photo Montage

DON capacitors from an Allied power supply. I'm going to recap it, then I'll post pics of them close up, they died so hard

You should dissect them also, and see if that orange gook is all over the inside too xD

[Downward_Spiral]

Re: The Hall of Shame - Badcaps Photo Montage

I created an account because it seems many people here have had the exact same problem I have. My Samsung SyncMaster 216BW computer monitor (5 years old) would flicker and hum, then shut down and had to be power cycled several times to stay on. I just ordered the replacements.

The caps in the worst condition are the CapXon 820uf 25v. The short 330uf 25v in the back of the first picture (out of focus) has slight leakage as well. My computer room probably gets well over 100 deg.F in the summer if my brother and I are both gaming in here. I wouldn't be surprised if that was part of the cause.

[c_hegge]

Re: The Hall of Shame - Badcaps Photo Montage

I've had two Samsung 226BW monitors with bad CapXons in their PSUs. Monitor PSUs do tend to run warm, since they don't have any fan or much ventilation to keep them cool, so bad caps should never be used there.

[Mike Jenk]

Re: The Hall of Shame - Badcaps Photo Montage




Vizio

[apraxisz]

Re: The Hall of Shame - Badcaps Photo Montage

Linksys SD2008 gigabit switch

[herita]

Re: The Hall of Shame - Badcaps Photo Montage

oki you guys , today i have gift for you

on my table, i have one LENOVO A61 mainbroad with plenty of bad boys

so here is the menu, enjoy

the whole thing


what a shame : 6.3v and 16v:


humh ...


Beside video controler



ps: i don't know the brand name of these caps

[Wester547]

Re: The Hall of Shame - Badcaps Photo Montage

They're KZGs, a capacitor series from Chemicon. Their electrolyte is unstable (too much iron?) so they eventually fail in a few years of even moderate use, especially with added ripple and heat. KZJs also fail in a similar manner. All other series from Chemicon are good. Your images are interesting, though - KZGs often fail without bloating, but not so in your account of them.

[ben7]

Re: The Hall of Shame - Badcaps Photo Montage

I say its time to open up the PSU, seeing that widespread capacitor failure there! :O

[c_hegge]

Re: The Hall of Shame - Badcaps Photo Montage

^
Not necessarily, KZG and KZJ will fail like that with a perfectly good PSU.

[ben7]

Re: The Hall of Shame - Badcaps Photo Montage

^
Not necessarily, KZG and KZJ will fail like that with a perfectly good PSU.

Ah

but, wow, its like one got sick and they all got the same disease :P

[herita]

Re: The Hall of Shame - Badcaps Photo Montage

^
Not necessarily, KZG and KZJ will fail like that with a perfectly good PSU.

yep, i confirm, the PSU works perfectly, i have checked all caps inside PSU, they all work great

it seems like heating killed those caps on the broad. chipset ATI on north bridge is often so hot.

[iToasterman]

Re: The Hall of Shame - Badcaps Photo Montage