Hello everyone! I 've been following the site a long time now and I was helped a lot from your answers. This time is no exception. After buying a MSI b350 mobo and thorough inspection for cables and components to be connected properly, I tried to boot up my system and after 10 seconds it smelled funny. I tweaked it a little bit and the problem continued. I took it to the shop where I purchased it and they told me that there is a burnt capacitor (A close inspection showed that a 6NH38 capacitor under the second pcie has fried - just above the JLED1 header) and that voids the warranty. Since no replacement was made, I contacted MSI and told them my case - They told me to go to the vendor (LOL!) or address the RMA team (Too much hassle, no time to establish a case and contact them about it. But I will consider it, if nothing else can be done). My questions are:1) Is it possible to replace that particular capacitor and re-solder it on the mobo? I 've been trying to find something by googling with no luck. 2) Is it possible, if this connector-capacitor (hard to tell to be honest) leads to the JLED1 header, to short-circuit the header and get it "up-and-running" again? Thank you very much. (by the way I have bought another mobo the X470 aorus and is working perfectly).
msi b350 gaming plus - burnt capacitor
- Thread starter aggegyft
- Start date
Solution
helpstar
Titan
- Dec 25, 2012
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Which power supply are you using? Did you connect anything to the JLED1 connector?
Get back to the vendor and insist that this is a case of warranty. It´s clearly on them to replace the motherboard or repair it. If they really persist get back to MSI and RMA it yourself.
A shop is most likely not qualified to do troubleshooting on this level.
Any try repairing it yourself will void warranty for sure.
To get the correct capacitor you would need the exact values of it. And even if you can get the correct one, it´s not excluded that it will burn again because of a different fault on the motherboard.
Get back to the vendor and insist that this is a case of warranty. It´s clearly on them to replace the motherboard or repair it. If they really persist get back to MSI and RMA it yourself.
A shop is most likely not qualified to do troubleshooting on this level.
Any try repairing it yourself will void warranty for sure.
To get the correct capacitor you would need the exact values of it. And even if you can get the correct one, it´s not excluded that it will burn again because of a different fault on the motherboard.
Thanks again for your answer. I tried that but they were unable to fix it due to lack of knowledge, they are only retailers. They contacted the distributor, here in Greece, and he blatantly rejected any kind of reimbursement. Unfortunately, since the only option is either RMA it to MSI or fix it by myself (as I lack the time, tools and knowledge to do it), I will try to contact MSI again and see where it goes. For the record, I used the thermaltake toughpower grand rgb 650w and on the JLED i connected the 4pin from the rgb controller (aerocool), which by the way on the new mobo works perfectly. From your point of view, is it possible to short circuit and bypass it? I ll get on with the RMA solution then.
helpstar
Titan
- Dec 25, 2012
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Could you post a detailed picture, where the capacitor is gone on your motherboard? Do you still have the component or is it broken and still soldered on the board?
You can use any free image hoster to upload the pictures and post the links of these
You can use any free image hoster to upload the pictures and post the links of these
You can find the image here: https://we.tl/t-FlmlIcdpVi
The component says 6NH38 on it and maybe I have 2 burnt ones. It's difficult to see, but the picture is as detailed as it can be. It's still soldered on the mobo. The big black slot is the PCI and the 4 pins on the bottom is the JLED1.
helpstar
Titan
- Dec 25, 2012
- 13,249
- 776
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The 6NH38 component is a transistor, mosfet or similar and has 3 pins. Should be a SOT 23 (case of the component). A capacitor would have only 2 pins. The one which is burnt should be replaced and the one on the left of the picture as well.
Unfortunately I couldn´t find the model over the net.
What´s the chips´ name on the left of the PCI2 port and the one bottom right, ending with "ton"?
Unfortunately I couldn´t find the model over the net.
What´s the chips´ name on the left of the PCI2 port and the one bottom right, ending with "ton"?
According to some articles over the net, it's a fan header controller from nuvoton the 3947SA and the chip left of the PCI is texas instruments efuse power MUX TPS25944L which if I understand correctly is used as a power management chip for the bus controller. I think we are getting somewhere. The only option that remains now is to find what transistor /semi-conductor component manufacturer, MSI has used on the mobo and finally come to closure (either by RMAing it, or have an electronics repairer look at it and maybe fixing it. It depends).
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