[Reward] Power? AsicMiner Blade V2

[BryanK]

Ok. I have a Backplane, and 1000W PSU.
I had a blade about a month ago and it ran flawlessly (i sold it). I have a new blade in which I got today that does not power on.
PSU is on and running.. Jumper is in place, Blade plugged in (properly). Fuse appears to be fine. I plug in the ethernet and have no indication of power and no ethernet flash  

I've done my research and have not found the solution. Ive ran through the setups multiple times but apparently somethings up here... Any help would be appreciated.


.. Having a backplane should make this setup pretty seamless...Wondering if its a blade issue or I'm missing something

edit:
i should also say that obviously I cannot navigate to 192.168.1.254:8000
I also tried resetting blade

edit2:
Checked Power:
I have 12.6v on the board as well as at top of the blade
I also have 12.6 at the fuse at the top too.. Suggestions?

***One thing I noticed is that I don't have any power coming out of the X12 output (at the top)...
^ i feel like the kid i bought this off of maybe shorted this? What can be done here to fix the blade. Theres power throughout the blade except here.

Willing to offer a small reward to someone who helps me to complete resolving of the issue

Thanks
Bryan

[1714812335]

1714812335

[BryanK]

I swear i had this same issue last time but I'm not sure lol

[BryanK]

Bump on this.

[aznatama]

If it's plugged in correctly (not reversed) and the voltage is fine, then you may have a defective blade.

[BryanK]

If it's plugged in correctly (not reversed) and the voltage is fine, then you may have a defective blade.

No, It's definitely plugged in correctly Heat sink facing the PSU.

[BryanK]

If it's plugged in correctly (not reversed) and the voltage is fine, then you may have a defective blade.

No, It's definitely plugged in correctly Heat sink facing the PSU.

Agh, this is annoying. lol.
I've lost two days on this blade.

[caminilegroup]

Have you taken a vmm to the power terminals on the board to see if it is getting power?

With the power supply on hook up your vmm to the 12+ and 12- on the board, if you get 12v then do the same thing on the top of the blade, if you get power there then you have a defective blade.

If you get power on the board but not the top of the blade, a fuse is blown.

If you don't get power on the board terminals, then it is the power supply.

[BryanK]

Have you taken a vmm to the power terminals on the board to see if it is getting power?

With the power supply on hook up your vmm to the 12+ and 12- on the board, if you get 12v then do the same thing on the top of the blade, if you get power there then you have a defective blade.

If you get power on the board but not the top of the blade, a fuse is blown.

If you don't get power on the board terminals, then it is the power supply.

Thank you for your input. Ill check with what you suggested and check back in.

Thanks

[BryanK]

Have you taken a vmm to the power terminals on the board to see if it is getting power?

With the power supply on hook up your vmm to the 12+ and 12- on the board, if you get 12v then do the same thing on the top of the blade, if you get power there then you have a defective blade.

If you get power on the board but not the top of the blade, a fuse is blown.

If you don't get power on the board terminals, then it is the power supply.

Thank you for your input. Ill check with what you suggested and check back in.

Thanks

k, I have 12.6v on the board as well as at top of the blade

I also have 12.6 at the resistor at the top too.. Suggestions?


One thing I noticed is that I don't have any power coming out of the X12 output (at the top)...
^ i feel like the kid i bought this off of maybe shorted this? What can be done here to fix the blade. Theres power throughout the blade except here.

[caminilegroup]

Have you taken a vmm to the power terminals on the board to see if it is getting power?

With the power supply on hook up your vmm to the 12+ and 12- on the board, if you get 12v then do the same thing on the top of the blade, if you get power there then you have a defective blade.

If you get power on the board but not the top of the blade, a fuse is blown.

If you don't get power on the board terminals, then it is the power supply.

Thank you for your input. Ill check with what you suggested and check back in.

Thanks

k, I have 12.6v on the board as well as at top of the blade

I also have 12.6 at the resistor at the top too.. Suggestions?


One thing I noticed is that I don't have any power coming out of the X12 output (at the top)...
^ i feel like the kid i bought this off of maybe shorted this? What can be done here to fix the blade. Theres power throughout the blade except here.

X12,13,14 are for fans. I have brand new blades and don't have power on them either, although that could be my own fault too.

If you have power at all the points, then it is most likely a faulty board. Have you checked the 3.3 tp also?

[BryanK]

Have you taken a vmm to the power terminals on the board to see if it is getting power?

With the power supply on hook up your vmm to the 12+ and 12- on the board, if you get 12v then do the same thing on the top of the blade, if you get power there then you have a defective blade.

If you get power on the board but not the top of the blade, a fuse is blown.

If you don't get power on the board terminals, then it is the power supply.

Thank you for your input. Ill check with what you suggested and check back in.

Thanks

k, I have 12.6v on the board as well as at top of the blade

I also have 12.6 at the resistor at the top too.. Suggestions?


One thing I noticed is that I don't have any power coming out of the X12 output (at the top)...
^ i feel like the kid i bought this off of maybe shorted this? What can be done here to fix the blade. Theres power throughout the blade except here.

X12,13,14 are for fans. I have brand new blades and don't have power on them either, although that could be my own fault too.

If you have power at all the points, then it is most likely a faulty board. Have you checked the 3.3 tp also?

where is 3.3 tp?

Thanks!

[caminilegroup]

Have you taken a vmm to the power terminals on the board to see if it is getting power?

With the power supply on hook up your vmm to the 12+ and 12- on the board, if you get 12v then do the same thing on the top of the blade, if you get power there then you have a defective blade.

If you get power on the board but not the top of the blade, a fuse is blown.

If you don't get power on the board terminals, then it is the power supply.

Thank you for your input. Ill check with what you suggested and check back in.

Thanks

k, I have 12.6v on the board as well as at top of the blade

I also have 12.6 at the resistor at the top too.. Suggestions?


One thing I noticed is that I don't have any power coming out of the X12 output (at the top)...
^ i feel like the kid i bought this off of maybe shorted this? What can be done here to fix the blade. Theres power throughout the blade except here.

X12,13,14 are for fans. I have brand new blades and don't have power on them either, although that could be my own fault too.

If you have power at all the points, then it is most likely a faulty board. Have you checked the 3.3 tp also?

where is 3.3 tp?

Thanks!

https://lh4.googleusercontent.com/-hghAPGmSelk/UpFeCHeGY6I/AAAAAAAAQQo/kQodE4j97DY/s800/IMG_0756.jpg

X7 (XXXXX)
        ^

[sidehack]

You should see 3.3V across C286, and 1.05V at C166/167, C181/182 etc

Also take a close look at IC73, the PIC, to see if it's got any craters in it. I have partially-functional blade with visible rupture on this chip.

[BryanK]

Have you taken a vmm to the power terminals on the board to see if it is getting power?

With the power supply on hook up your vmm to the 12+ and 12- on the board, if you get 12v then do the same thing on the top of the blade, if you get power there then you have a defective blade.

If you get power on the board but not the top of the blade, a fuse is blown.

If you don't get power on the board terminals, then it is the power supply.

Thank you for your input. Ill check with what you suggested and check back in.

Thanks

k, I have 12.6v on the board as well as at top of the blade

I also have 12.6 at the resistor at the top too.. Suggestions?


One thing I noticed is that I don't have any power coming out of the X12 output (at the top)...
^ i feel like the kid i bought this off of maybe shorted this? What can be done here to fix the blade. Theres power throughout the blade except here.

X12,13,14 are for fans. I have brand new blades and don't have power on them either, although that could be my own fault too.

If you have power at all the points, then it is most likely a faulty board. Have you checked the 3.3 tp also?

where is 3.3 tp?

Thanks!

X7 (XXXXX)
        ^

Checked 3.3, I'm not getting any reading off of that. However, i must state I am not sure what I need to read in combination of this pin. Where should I place my meter probes?

Thanks

[BryanK]

You should see 3.3V across C286, and 1.05V at C166/167, C181/182 etc

Also take a close look at IC73, the PIC, to see if it's got any craters in it. I have partially-functional blade with visible rupture on this chip.

Not getting anything across 286 nor the C166/167. Have to be honest though, like the comment above, Im not sure If I am probing the correct spots.
IC73 does not have any craters or ruptures in it.

Thanks for your help!

[sidehack]

Measure across the fuse - black lead on one side, red lead on the other. If you measure 12V across the fuse, I'd say your fuse is blown and should be replaced. No volts across any of the output caps for the various regulators means none of them are working, which means either every single one is somehow disabled, every single one is blown, or every single one is not getting power. The last option is by far the most likely, and the chief culprit is the fuse.

Is this a green-board blade with a fuse soldered on, or a blue-board blade with a socket? I've seen a few of the socketed blue-boards that had a bunged socket where the fuse made bad contact at one end, or the solder job was done poorly and didn't connect at one end.

[BryanK]

Measure across the fuse - black lead on one side, red lead on the other. If you measure 12V across the fuse, I'd say your fuse is blown and should be replaced. No volts across any of the output caps for the various regulators means none of them are working, which means either every single one is somehow disabled, every single one is blown, or every single one is not getting power. The last option is by far the most likely, and the chief culprit is the fuse.

Is this a green-board blade with a fuse soldered on, or a blue-board blade with a socket? I've seen a few of the socketed blue-boards that had a bunged socket where the fuse made bad contact at one end, or the solder job was done poorly and didn't connect at one end.

I get 12V across the fuse at top (f1)
This is the Green board with the fuse soldered on.

You think it would be a good start to replace that fuse? Where do they sell replacements? I haven't been able to find one around my area.

This is the case on two of my blades.

[caminilegroup]

When you checked for the 3.3 volts, your black lead stick it in ground, you can clamp it in the 12- on the board if you want or the port on the top with the piece that slides in.

[BryanK]

When you checked for the 3.3 volts, your black lead stick it in ground, you can clamp it in the 12- on the board if you want or the port on the top with the piece that slides in.

Ok - I get nothing out of 3.3v

[caminilegroup]

It sounds like a faulty voltage regulator.

Probe the serial lines, one section over from the 3.3 section, you will have gnd, tx, rx. Probe the tx and rx and see if you have 3.3 on there. If you have an oscilloscope you could check the output, but seeing if 3.3 is on the tx and rx lets you know whether or not the serial port is active.

All roads are leading to a faulty board. No 3.3 would lead to a voltage regulator, and it the vr went bad and opened it could cause a whole host of problems. Now for all your baldes to have the same issue is troublesome.