Hello,
Recently, five capacitors on my desktop's motherboard failed. For the past week or so, the computer had been randomly shutting down. I suspected a heat issue, so I checked the CPU temperature and found that the temperature went up to about 120 degrees Celsius when I stressed the CPU before turning itself off, well above the 65 degree maximum that AMD specifies. I thought reapplying thermal compound on the CPU might help, so I started to take off the CPU heatsink. As I loosened the last screw holding the heatsink to the motherboard, I heard a strange hissing sound. When I got the heatsink off of the CPU, I noticed that there was some earwax-orange colored crusty gunk (I'm not sure what the formal name is) all over the bottom of the heatsink. I looked on the motherboard to see what was under the heatsink at that point and I found five bulging capacitors with more of the crusty gunk on them. I think the heatsink may have been pressing down on the capacitors to prevent them from expanding, and the hissing was them finally expanding when the pressure from the heatsink was removed.
I plan on replacing these failed capacitors myself, but I cannot identify the specifications of them from the markings on the cases. The failed capacitors have the markings "5B 680 4J" and no brand listed. I know little about capacitors, so I googled capacitor markings. Based on what I read, the 680 either means 68 farads (which from my understanding of capacitors seems way too high), or 68 picofarads (which seems way too low). I have no idea what the 5B and 4J mean.
I have uploaded a picture of the failed capacitors. I have removed the orange gunk from them, but you can still see that they are bulging. Please help me identify the voltage, capacitance, and any other important information. Any other help or suggestions would also be appreciated.
Thanks,
Ben.
Recently, five capacitors on my desktop's motherboard failed. For the past week or so, the computer had been randomly shutting down. I suspected a heat issue, so I checked the CPU temperature and found that the temperature went up to about 120 degrees Celsius when I stressed the CPU before turning itself off, well above the 65 degree maximum that AMD specifies. I thought reapplying thermal compound on the CPU might help, so I started to take off the CPU heatsink. As I loosened the last screw holding the heatsink to the motherboard, I heard a strange hissing sound. When I got the heatsink off of the CPU, I noticed that there was some earwax-orange colored crusty gunk (I'm not sure what the formal name is) all over the bottom of the heatsink. I looked on the motherboard to see what was under the heatsink at that point and I found five bulging capacitors with more of the crusty gunk on them. I think the heatsink may have been pressing down on the capacitors to prevent them from expanding, and the hissing was them finally expanding when the pressure from the heatsink was removed.
I plan on replacing these failed capacitors myself, but I cannot identify the specifications of them from the markings on the cases. The failed capacitors have the markings "5B 680 4J" and no brand listed. I know little about capacitors, so I googled capacitor markings. Based on what I read, the 680 either means 68 farads (which from my understanding of capacitors seems way too high), or 68 picofarads (which seems way too low). I have no idea what the 5B and 4J mean.
I have uploaded a picture of the failed capacitors. I have removed the orange gunk from them, but you can still see that they are bulging. Please help me identify the voltage, capacitance, and any other important information. Any other help or suggestions would also be appreciated.
Thanks,
Ben.
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