Hi all,
I got a supermicro motherboard (X10QBi) from ebay but during transportation 7 pcs(805) and 2pcs smaller caps ripped off from the backside of the board, i found 6 of the 805 size caps inside the box but rest was gone.
i tried to repair the board by measuring the fallen caps with an LCR meter(4 of them was between 9-9.7uF, one of them was 16uF and the last one was 6.5uF), since most of them was around 10uF i ordered 10uF 16V 10% x5R 805 SMD caps and soldered them, could not solder or measure the smaller ones so i left them as it is.
when i powered the board everything worked as it should be, entered the bios to check the components(nvmes, rams etc.) one at a time, after couple restarts one of the caps(C1437) near the cpu 4(at the front side) exploded during boot, i cleaned the cap and pads and power it on again to see what is working and what is not. MB powered on normally again, i checked all the pcies, cpus, rams, boards installed etc. everything was working fine.
Today i wanted to try to install the OS(windows pro workstation), when i turn on the power, another cap(C1436) which is next to blown cap exploded but MB was still working full capacity and i was able to install the OS.
Then i wondered if these one by one exploding caps are somehow related to the caps i soldered at the backside so with a multimeter i checked if they are connected as it seems they are connected to two caps at the back which i soldered(C1234 and C1235). I am a newbie in electronics so i wonder if some of you guys can help me find out what is wrong and how to fix it.
I already contacted with supermicro support and they are not willing to help.
the interesting thing is, the caps i soldered are not burning but some other caps are burning one by one. I stoped powering on the MB not to burn more caps or damage the hardware.
Thanks in advance for your help.