[Help!] Akitio Thunder2 and Power Overload: A Cautionary Tale
 
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[Help!] Akitio Thunder2 and Power Overload: A Cautionary Tale  

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Yukikaze
(@yukikaze)
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Joined: 4 years ago
 

Unfortunately I have to report that due to my stupidity, I managed to fry one of my two Akitio Thunder2 enclosures. I suspect it was caused by me trying to overclock my GTX750Ti and pushing it way too far. Since my GTX750Ti does not have a 6-pin PCIe input, I must've caused an overload on a specific Akitio PCB component by exceeding the max slot power by some amount (my GTX750Ti has an increased TDP BIOS). As a result, one of the components on the Akitio PCB have fried, magic smoke and all.

The cautionary tale here is that if you have a card that does not receive additional power from a 6-pin/8-pin connector, you can cause the card to pull more power through the slot than the Akitio can provide, with the result being damage to your Thunder2. Be careful! The corollary here is that the RX480, without the driver fix to the PCIe slot power over-draw, is also dangerous to use. If you are running such a setup, make sure your driver is updated.

While I do have access to a micro-soldering station, and I should be able to replace the component, I need some help figuring out what that thing is first. It is labeled "5HAF" and sits just above the 4-pin yellow/black power connector crossing between the two Akitio PCBs, and the PCB position is marked with "03". You can see the picture below (the picture is from my other, functional, Thunder2 - In the fried one, the component is deformed).

Can someone help me out to figure out what this thing is, and where I can get a replacement? It doesn't look like any other damage has occurred, as the Akitio powers up without any issue, displaying both the power LED and the TB link LED, but the video card sitting in the slot no longer receives power. I suspect this broke the power circuit.

What is this thing? Where can I get a new one?

20161203 143106

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nando4
(@nando4)
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Joined: 4 years ago
 

Looks like a SOT-8 SMT chip. "5HAF" not googling anything. Voltage regulator? The huge square chip above it looks like a fuse. Did you check if perhaps it's blown? ie: high resistence across it instead of minimal resistence showing up on a multimeter.

If no leads there, then may AKiTiO support can help explain what that chip is.

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itsage
(@itsage)
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Joined: 4 years ago
 

Sorry to hear man. Have you swapped the thunderbolt 2 boards around? I tried an R9 Nano a while back and it shut down my Thunder2 abruptly. I couldn't power it back on so it took the whole thing apart to check. Didn't find anything abnormal. After I put it back together it started working again.

Worst case scenario you can contact Digikey to inquire about getting a replacement component. http://www.digikey.com/

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nkh004
(@nkh004)
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Joined: 4 years ago
 

Its a transistor, identified by the Q next to the component.

I looked at mine and see 58AS written on the top. As for where to get one, your guess is as good as mine. I tried to google '58AS Transistor' but didn't get an easy and clear option. 

5HAF got even less results. Good luck! Let us know what you find. 

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Yukikaze
(@yukikaze)
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Joined: 4 years ago
 

I'll take a picture of the blown one when the light is a bit more favorable tomorrow, my cellphone camera sucks as it is. That thing is all bloated and deformed on the blown one.

I contacted Akitio with the hopes they'll tell me what it is. If they'll do, I'll pass it along Smile

Want to output [email protected] out of an old system on the cheap? Read here.
Give your Node Pro a second Thunderbolt3 controller for reliable peripherals by re-using a TB3 dock (~50$).

"Always listen to experts. They'll tell you what can't be done, and why. Then do it."- Robert A. Heinlein, "Time Enough for Love."

 
2012 14" Lenovo Thinkpad T430s [3rd,2C,M] + RX 550 @ 10Gbps-TB1 (Atto Thunderlink) + Win10 [build link]  


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Yukikaze
(@yukikaze)
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Joined: 4 years ago
 

Okay, I've gotten a reply from Akitio support. The fried part is a MOSFET, with part number: FDC610PZ.

 

I ordered a couple from Digi-Key. Here's to hoping that replacing it will get my poor Thunder2 back up and running.

 

Want to output [email protected] out of an old system on the cheap? Read here.
Give your Node Pro a second Thunderbolt3 controller for reliable peripherals by re-using a TB3 dock (~50$).

"Always listen to experts. They'll tell you what can't be done, and why. Then do it."- Robert A. Heinlein, "Time Enough for Love."

 
2012 14" Lenovo Thinkpad T430s [3rd,2C,M] + RX 550 @ 10Gbps-TB1 (Atto Thunderlink) + Win10 [build link]  


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itsage
(@itsage)
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Very good to know you got a response from AKiTiO with the answer on which component that was. This will be very useful when we burn those suckers.

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Yukikaze
(@yukikaze)
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Joined: 4 years ago
 

Update: It is dead. The heat damaged the PCB itself as this thing fried and it pretty much fell apart at that spot.

Crap. Expensive overlocking session, right there.

Want to output [email protected] out of an old system on the cheap? Read here.
Give your Node Pro a second Thunderbolt3 controller for reliable peripherals by re-using a TB3 dock (~50$).

"Always listen to experts. They'll tell you what can't be done, and why. Then do it."- Robert A. Heinlein, "Time Enough for Love."

 
2012 14" Lenovo Thinkpad T430s [3rd,2C,M] + RX 550 @ 10Gbps-TB1 (Atto Thunderlink) + Win10 [build link]  


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Plastixx
(@plastixx)
Trusted Member
Joined: 4 years ago
 

So follow the blown traces and use small pieces of wires to bridge the connections. Shouldn't be too difficult unless it's more than a 2-layer PCB.

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Yukikaze
(@yukikaze)
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Joined: 4 years ago
 

I looks like following the leads would be very, very difficult, even if I could even figure it out in the first place.

Want to output [email protected] out of an old system on the cheap? Read here.
Give your Node Pro a second Thunderbolt3 controller for reliable peripherals by re-using a TB3 dock (~50$).

"Always listen to experts. They'll tell you what can't be done, and why. Then do it."- Robert A. Heinlein, "Time Enough for Love."

 
2012 14" Lenovo Thinkpad T430s [3rd,2C,M] + RX 550 @ 10Gbps-TB1 (Atto Thunderlink) + Win10 [build link]  


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