Re: The Hall of Shame - Badcaps Photo Montage
^ Yeah, they look like rocket-ships! :P
^ Yeah, they look like rocket-ships! :P
-
Muh-soggy-knee -
Re: The Hall of Shame - Badcaps Photo Montage
They make KZG look like top of the range!Comment
-
Re: The Hall of Shame - Badcaps Photo Montage
Wow that is amazing! I didn't know caps could even do that by themselves
here are some Skywell SHIT series 
from an Nvidia FX 5200. Bought in July, 2004 failed in January, 2007. There was a ton of dried electrolyte on the tops of the caps but it fell off
Attached FilesComment
-
-
Re: The Hall of Shame - Badcaps Photo Montage
I'm surprised that small un-vented one hasn't exploded yet :PMuh-soggy-kneeComment
-
Re: The Hall of Shame - Badcaps Photo Montage
The SEL series is polymer. That's why it hasn't popped.Comment
-
Re: The Hall of Shame - Badcaps Photo Montage
Replace it if you want to be safe.Comment
-
Re: The Hall of Shame - Badcaps Photo Montage
Maybe someone can help since you know so much about capacitors.
I have a Magnavox 47MF437B LCD TV and one night watching tv I heard
snap or a sound like a small firecracker, than my tv went black.
Someone told me it was the caps so I took off the back and looked at all and I mean all of the caps and found nothing wrong with them. What else would make that kind of sound and cause the problem with my tv ? Any Help ?Attached FilesComment
-
-
Re: The Hall of Shame - Badcaps Photo Montage
Someone posted these on reddit:
http://www.reddit.com/r/techsupportg...smelled_funny/
Comment
-
Re: The Hall of Shame - Badcaps Photo Montage
Holey Carp! What happened? Did the mobo develop an internal short on a high current voltage plane?!PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
****************************
To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
****************************Comment
-
Re: The Hall of Shame - Badcaps Photo Montage
Look at those tough Panny's. Right in the center of the fire of hell and not venting
Comment
-
Re: The Hall of Shame - Badcaps Photo Montage
^ WHAT THE F@#$!!!
Must have... then again, why would there be a high current voltage plane in that area of the board? The highest current is around the CPU and sometimes around NB. Other parts of the board are usually low power and all linear regulated. Also, I've tried shorting high-current planes on motherboards before - they all spark and then the motherboards shut down. Haven't found any buck regulators that don't have OCP.Originally posted by PeteS in CA
This is coming out of an ASUS motherboard, though, so I'm not too surprised. I have an AsRock that has bad PCB discoloration under the RAM linear regulators. The MOSFETs in that circuit get so hot that you cannot touch them and so do the caps around them. ECS may be crappy, but at least I haven't seen them do things like that - not as often as ASUS and AsRock anyways.
ASUS
Panny's are indeed the toughest caps I've seen. I used to rework Xbox 360s, and one particular one I reworked at least 8 times (removing/reballing GPU). The Panny's never even bulged a little, despite being heated so many times on the rework machine. The Rubycons and Nichicons usually start to bulge a little after 3-4 heat cycles (though it is a recoverable bulge - i.e. not due to the electrolyte failing but only due to excessive pressure buildup from the heat... after they cool you can press their top down and it will stay that way and cap appears fine on ESR meter even after months).Originally posted by Pentium 4Look at those tough Panny's. Right in the center of the fire of hell and not venting
Also, in HP DC5000 SFF computers, Panny's are the only caps I've never seen bulged by the CPU. The Rubycon MCZ usually do.
Pannasonic
Last edited by momaka; 01-06-2013, 11:18 PM.Comment
-
Re: The Hall of Shame - Badcaps Photo Montage
You know, if it was a high current plane then the power supply would have blown up, or shutdown. However, it only takes a few watts to make an electrical fire! I bet something shorted and it was connected through a long, somewhat thin trace which heated up and caught the board on fire, but that is just a guess. It would take a minute or two for a semiconductor burnout to actually make the motherboard smoke though.Muh-soggy-kneeComment
-
Re: The Hall of Shame - Badcaps Photo Montage
My guess would be a protection PTC for one of the outputs, like USB or Firewire. They do like to burn when they fail.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: The Hall of Shame - Badcaps Photo Montage
Yes, but not this badly!
I don't think we are seeing the full story here. There must have been something else in the case below the motherboard that continued to burn after whichever component set off the initial fire. PC boards are usually UL 94 compliant and V-0 rated (meaning that the board should extinguish itself in 10 seconds or less once the heat/fire source is removed).
For the board to burn like that by itself, it will take it a lot more than a few watts. My only guess to all of this is if an internal trace in the PCB from the 12V rail shorted to ground and if the trace itself wasn't thick enough to trip OCP AND if the PSU had a single 12V rail with lots of Amps available.
Regardless, I still dislike ASUS/AsRock
.
Last edited by momaka; 01-08-2013, 09:04 PM.Comment
-
Re: The Hall of Shame - Badcaps Photo Montage
My newest favourite capacitor brand:
These were in a junk M-tech "450W" psu. The unit's standby circuit is horribly shorted. These are all the caps from the secondary! 2200uF 16V, 1000uF and 2200uF 5V. All dry or shorted, but no visual indication.Attached FilesComment
-
-
Re: The Hall of Shame - Badcaps Photo Montage
I have seen those before too.
Then use thick aluminum though, good for exploding! :PMuh-soggy-kneeComment
-
Re: The Hall of Shame - Badcaps Photo Montage
Picture 1&2: Bad JENPO Caps from a Chieftec/High power HPC-340-201 PSU
Picture 3: Bad JAMICON cap from a bestec PSU
Picture 4: Bad HEC cap from a FARES 400W PSUAttached FilesComment
-
-
I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
Introducing... the POS-124Z which really is a POS:
Yep it's a POS allright.
I tried powering it up. It's a KILLER - not fried, but sure will fry things! I got 21V out of it unloaded according to my DMM!
I tried 21W load (car lamp) - got 16V, which is really pushing that lamp.
Then I tried a 50W load (car headlight) - got 13.2V. Not too bad but this is with the heavy load...except the circuit breaker kept tripping.
So I had to take a peek:
EIEW. Looks like a Darlington emitter follower + Zener device. Heatsinking?... -
While our PSU hall of shame thread is fun I thought It'd be fun to have a ripple hall of shame thread too
I'll go first out, it's an industrial PSU that offers +15v -15v -5v +5v rails.
However it has been mounted on a frame with DC/DC converters for producing +12v and -12v as well.
The caps for this have gone a bit high ESR
The measured ripple is around 1700mV, or 1.7v!
After recapping the ripple is gone, also note that the scale on the scope is 50mV/div instead of 500mV per div in this shot
-And that's how you know you have a qualifying... -
Hi any suggestion would really help.
I have Hp Envy X360 13 which is AMD.
Model : 13-ar0005AU
motherboard No : 18740-1.
Problem : can't turn on.
After inspecting the motherboard, I discovered that one of the hall sensors was broken. Can't find the schematic for this board, so not sure about this SMD device number.
Does anyone know the serial number of this LID Switch? -
Back in 2020 i bought a (2nd hand) compact ATX psu to replace my current one. My PC case only fits very short ATX power supplies so i didn't really have the choice of buying a decent 80Plus unit. The current unit is a modded YoungYear unit that i made a thread about a while ago:
A "nice" YoungYear unit? - Badcaps
The "new" unit is a KDM-M6480 480W psu, the 480W number is a typical KDM bullshit claim of course, but the 24A rating on the 12V rail seemed reasonable and the "Active PFC" claim gave me a bit of hope that this was going to be decent-ish....
Comment