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Author Topic: Hacking BFL Monarchs and servicing them while times are weird.  (Read 18973 times)
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lightfoot
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March 05, 2018, 01:34:40 AM
 #181

These units are very interesting. I'm impressed that BFL was able to produce such a decent unit (albeit hot-running and below performance expectations) given all of their failings.
Yeah they had a tough time building the damn things. Main fault in retrospecitve was building such a fucking big chip; it ran so hot they couldn't run them in series like ants did, and trying to build a power step down supply that could feed the chips wound up with FETs that ran almost as hot as the chip (inefficient). A series string of 15 smaller chips would have been amazing, but they wanted to do the stupid plug it in your computer form factor.

And they were insane. Ah well, no more domestic US miner manufacturers. Ants or nothing.
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March 24, 2018, 08:18:40 PM
 #182

apologies if this has been covered before.

i have a number of BFL Monarch.  they power up and run fine at idle.  within 5 minutes of mining the temps at 90C and cut off.  any ideas where i should start?


Thanks
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March 26, 2018, 12:12:45 PM
 #183

apologies if this has been covered before.

i have a number of BFL Monarch.  they power up and run fine at idle.  within 5 minutes of mining the temps at 90C and cut off.  any ideas where i should start?


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Could be several things.

1) Cooling pump is dead so the fluid is not moving.
2) All the coolant leaked out (or was drained)
3) The cooling blocks are not solidly attached to the chips.

If you know someone with PC liquid cooling experience they can usually tell you in a few minutes if it's any of those. And for the most part #1 and #2 they are easily (if not cheaply) fixable. #3 is quick and simple but usually not the issue.

Did you get them used or have you had them since new? Did they ever work?

-Dave
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March 27, 2018, 02:39:44 AM
 #184

Dave's got it. I'd check first to make sure the fan on the front of the radiator is hooked up and working, then check to see if the radiator is getting warm (indication of pumps running). Then check to make sure the fan on the back works, then let's go from there.

C
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March 29, 2018, 06:05:26 AM
 #185

Hi,  thanks for the reply's.

i bought them used at a very god price for a bit of fun.

1 - work but at a lower rate. (500 ghz instead of 700 ghz)
1 - I've got one to work, however runs a little hot (68 - 78 C)
2 - overheat within 5 minute of mining.

unfortunately there no one in my area that every seen water-cooling.  plus i couldn't trust the quality of work as I'm in working in the middle east at the moment.



Cheers
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April 02, 2018, 06:27:41 AM
 #186

Just out of interest.

Has anyone been able to get the monarch to work on Dash Coin?
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April 02, 2018, 04:56:36 PM
 #187

Just out of interest.

Has anyone been able to get the monarch to work on Dash Coin?

Monarchs hash SHA256 coins. Dash is a different algorithm, won’t work.
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April 02, 2018, 04:59:34 PM
 #188

apologies if this has been covered before.

i have a number of BFL Monarch.  they power up and run fine at idle.  within 5 minutes of mining the temps at 90C and cut off.  any ideas where i should start?


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I have same issue but mine cut off in 5 secs not 5 minutes.
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April 03, 2018, 10:49:21 AM
 #189

hi,  does anyone know where the temperature sensor are, and if there replaceable?  my showing 150 C at start up........could be the problem me thinks. Grin
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April 24, 2018, 06:08:29 PM
 #190

hi,  does anyone know where the temperature sensor are, and if there replaceable?  my showing 150 C at start up........could be the problem me thinks. Grin
i would like to know as well
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May 20, 2018, 12:59:32 AM
 #191

Sorry, been away for awhile. The temp sensors are labelled T1 and T2. They are bottom center of the board, right outbound of the bottom two screws by the ISL chips that control the 6 phase FETs on each side.

You could ignore them by setting the temp on BFGMiner.conf to 200 or so, but make sure the temps on the chips really are reasonable before you do this.

C
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June 06, 2018, 10:17:13 AM
 #192

Sorry, been away for awhile. The temp sensors are labelled T1 and T2. They are bottom center of the board, right outbound of the bottom two screws by the ISL chips that control the 6 phase FETs on each side.

You could ignore them by setting the temp on BFGMiner.conf to 200 or so, but make sure the temps on the chips really are reasonable before you do this.

C


Got a IR temp reader, and looks like I am getting to hot. Looking next to the pumps. Is there a way to test the pumps without powering the board?
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June 07, 2018, 11:58:07 AM
 #193

Sure, the pumps just use normal 12v fan plugs. Use an adapter to connect a fan to a 12v power supply and fire them up. You should be able to hear the water running in the radiator if they are working.

Any evidence of water leaking (on the copper plates or bottom metal frame)?
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June 07, 2018, 12:07:01 PM
 #194

Sure, the pumps just use normal 12v fan plugs. Use an adapter to connect a fan to a 12v power supply and fire them up. You should be able to hear the water running in the radiator if they are working.

Any evidence of water leaking (on the copper plates or bottom metal frame)?

No water leaking evidence at all. I quickly tested one pump per your suggestion but got nada. Would I need to power both pumps at the same time?
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June 08, 2018, 11:25:09 AM
 #195

No each pump is independant. Try the second one, I haven't seen both fail together very often.
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June 08, 2018, 11:16:52 PM
 #196

No each pump is independant. Try the second one, I haven't seen both fail together very often.

I got 2 monarchs and somehow all 4 pumps are lifeless. I decided to sacrifice one. Any thoughts on where my pumps on this one went wrong? The little bit of liquid that did leak out was pretty black in color.

I have some burn/brown marks in the  in the middle

https://i.imgur.com/advZOYnl.jpg

One pump looks to have some green inside?

https://i.imgur.com/CobqcsHl.jpg

Think I snapped off the two wires for the pump controller.

https://i.imgur.com/prgaeZfl.jpg

here are other pictures for others interested

https://i.imgur.com/4QRnopzm.jpg https://i.imgur.com/jxGPyO7m.jpg https://i.imgur.com/ZArTFV1m.jpg https://i.imgur.com/nTlVhAFm.jpg

https://i.imgur.com/D1OrSFVm.jpg https://i.imgur.com/0KlOhRmm.jpg https://i.imgur.com/7tIqYLKm.jpg https://i.imgur.com/fML0JOsm.jpg
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June 09, 2018, 12:03:39 AM
 #197

My guess is that the cooling systems failed from pure and simple corrosion. A result of the crappy cooler mfgr they used.
A side note to this - and owners of PC's using similar self-contained cold-plate/pump/heat exchangers:A while back I came across Intel's performance and design specs for their CPU coolers. One rather surprising thing I learned that that they all have a rather significant coolant loss rate - not from leaks, but from the fluid just slowly passing through the hose walls via osmosis. Up to 1/2 ounce per-year with ~ 0.2.-.3 oz/year as typical.

For bitcoin to succeed the community must police itself - Joshua Zipkin aka Joshua Alexander leaked AMT A1 miner skype chats
How a miner mfgr SHOULD operate: HaggsFIN trip to Canaan My info useful? Donations welcome! 1Fuzzyk398kDWVjuC5qPX5v6CjSkvbgAbd
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June 12, 2018, 11:49:36 AM
 #198

I have a 750GH/s unit that when powered on, makes a few beeps and has loads of red lights flashing.

BFG miner is unable to detect it.


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June 13, 2018, 12:52:25 AM
 #199

I have a 750GH/s unit that when powered on, makes a few beeps and has loads of red lights flashing.

BFG miner is unable to detect it.

[...]

Do your pumps work? you can test the pumps without powering the board.
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June 13, 2018, 02:07:25 AM
 #200

My guess is that the cooling systems failed from pure and simple corrosion. A result of the crappy cooler mfgr they used.
A side note to this - and owners of PC's using similar self-contained cold-plate/pump/heat exchangers:A while back I came across Intel's performance and design specs for their CPU coolers. One rather surprising thing I learned that that they all have a rather significant coolant loss rate - not from leaks, but from the fluid just slowly passing through the hose walls via osmosis. Up to 1/2 ounce per-year with ~ 0.2.-.3 oz/year as typical.
No, they're full of propolyne glycol and although they run under pressure they don't corrode. What kills them is the insane heat; and if the fan up front ever stops then they will overpressure and blow out the seals.

Water cooling is neat, but as we learned with toy trains everything is hell with water.
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