Quote from: liton25 on March 02, 2025, 05:28:50 AM

₿ (241631) power_management: 7F vout: 0.05, iout: -0.29
₿ (241631) power_management: 24 vout: 1.24, iout: 29.25
₿ (241631) power_management: 14 vout: 1.24, iout: 29.34

So in other words, `24` and `14` are back to normal, but now `7F` is reading 0V.
The interface also shows some voltage in the bottom-right corner,
so there’s at least some power going through.

Is it hashing at all ?

My Lv08 with luckyminer os shows these temps.

Code:

₿ (416376) power_management: 7F vout: 1.23, iout: 31.91
₿ (416376) power_management: 24 vout: 1.24, iout: 28.06
₿ (416386) power_management: 14 vout: 1.23, iout: 26.28
₿ (416386) EMC2302: GET-Fan Speed[0] 502 = 3916 RPM, MSB 0x0F
₿ (416386) power_management: Board Temp: 48, 63
₿ (416396) power_management: TMP546_0 Temp: 63
₿ (416396) power_management: TMP546_1 Temp: 62
₿ (416406) power_management: TMP546_2 Temp: 58

Can you post your temperatures please ?

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Here are my main questions:
1. Could this be related to the way the heatsink is installed, or does it more likely indicate a problem with the power module/VRM?

Could be a lot of reasons.

To test you should first start by setting default values for freq: 485 Mhz
and default voltage: 1200 mV, save and restart.

Luckyminer basically copied the design of a bitaxe hex ultra and made it with 9 chips instead of 6
This is screenshot of the schematic diagrom of a the bitaxe hex ultra:
https://www.dth.net/crypto/miners/bitaxe/hex/set_of_3_BM1366_in_voltage_domain.jpg
As you can see 3 BM1366 are connected to 5 Volt for the control, but the power of the computing part of the asic is daisychained in series.
3 x 1200mV = 3.6 Volt being fed to one voltage domain.
The original HEX has 2 voltage domains so 2 x 3 chips in series
The LV08 has 3 voltage domains : 3 x 3 chips in series.
Each voltage domain has its own VR (voltage regulator)
The 7F,24 & 14 is the address of the VR on the BUS to the ESP32 microcontroller.

If you let the unit go "cold" so switched off for 30 minutes (ambient temperature) and you plug it in and check in the log files, does it work
Maybe you can try to capture the log file as fast as you can ? That should show in all 3 are starting up at all or not.
If the temp goes to high it will protect the hardware by setting low fre & low voltage to not let the asic burn up.

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2. It doesn’t seem to be a super rare issue. Among five to ten units, at least one has exhibited this behavior.

It could be chip issue, but more likely soldering issue
Weird thing is that all 3 VR domains seem to be affected.
I would have suspected 1 or 2 but not all 3 in a random sequence.

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3. Does anyone have any recommendations or fixes I could try?

Thank you so much for taking the time to read this.
I’m relatively new to this,
so I’m trying to give as much detail as possible.

Any help or suggestions would be greatly appreciated!