u/SoloMinerDoctor

Hi guys. I have one Nexus Hydro for sale.
$450 free shipping.
It was sold as 18Th. I pushed it to its limit and turned it down to 10-12Th.
It is getting hot and loud.
On 10Th it is as quiet as you can imagine.
PSU included.
I need USDT to pay for it.
No repair was done on this unit. All original parts from manufacturer.
You can see it was online for 14days already.

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🩺 Doctor’s Notes — VRM EKG
I had a patient with heart problems the other day.
Something wasn’t right, so I decided to perform an EKG and check which chamber was causing the trouble.
After some examination, I found the bad VRM. ❤️‍🩹
But today I want to show you what a normal VRM heartbeat looks like.
📈 Diagram #1 — Before the VRM
This is the power coming into the VRM. You can see the input waveform before the regulator performs its surgery.
📈 Diagram #2 — After the VRM
And this is what happens on the switching side.
The VRM is switching at approximately 500 kHz — that’s about 500,000 switching cycles every second.
That rapid switching is how the VRM controls the energy going to the ASIC and converts the input voltage into the lower, controlled voltage the chip needs.
So when you look at that waveform, don’t think the patient is having a heart attack. 😂
Those pulses are the heartbeat of the VRM.
A healthy VRM has a very busy heart.
500,000 beats per second. ❤️⚡
When the heartbeat looks abnormal, that’s when the Doctor starts looking for the problem.
Oscilloscope = EKG machine.
Probe = stethoscope.
VRM = heart chamber.
ASIC = brain. 🧠
And me = the doctor trying to keep the patient alive. 😂🩺
SoloMinerClinic — We don’t just replace parts. We diagnose the patient.

Today an unusual patient knocked on the clinic door.
He had already been treated by another doctor.
I opened the door… and immediately understood why he was looking for a second opinion. 😂
The patient was a NerdOctaxe, sitting on a simple stand.
Unfortunately, that “simple stand” had been working as a medieval torture device.
It had bent the PCB right in the middle.
And the PCB decided to stay that way.
I considered prescribing a chiropractor, but honestly… this patient was too fragile. One wrong adjustment and we might have needed a funeral instead of a repair. 😆
But that was only the beginning.
During examination, I found a dead short on one of the VRM circuits.
So I removed the patient’s helmet — the VRM heatsink.
And…
HOLY SMOKES.
One VRM was completely missing.
Another VRM was dead.
There are only four VRMs on this board.
At this point I started asking questions.
Then I discovered what the previous doctor had done.
Apparently, he performed VRM surgery without anesthesia.
He didn’t even remove the heatsinks before operating.
Flux residue was everywhere.
The 5V LDO capacitor was sitting there like it had been thrown into the body from across the room.
And the VRM heatsink?
It wasn’t touching the chips.
Not a little contact.
ZERO contact.
I have seen some questionable medical procedures in my clinic…
But this?
This wasn’t a doctor.
This was a torturer from medieval Europe. 🏰⚔️😂
The patient had clearly survived a visit to the dungeon.
I refused to simply tell him:
“Take some aspirin and see what happens.”
No.
He needed serious rehabilitation.
I performed a complete cleaning, installed two new VRMs, and gave each VRM its own personal cooling system — heatsinks on the front and the back.
After all that abuse, the patient was finally brought back to life.
And now…
He is hashing normally. ⚡⛏️
🩺 Doctor’s Final Notes:
PCB: bent, but alive.
VRMs: two replaced.
Cooling: restored.
Medieval torture: discontinued.
Hashing: GOOD.
Patient: DISCHARGED.
Guys, be careful who you let operate on your miners.
If someone offers you a repair for an unbelievably cheap price, there is usually a reason.
Sometimes you don’t save money on a cheap repair.
Sometimes you just pay for the second repair afterward. 😄
Love your toys.
Take care of them.
Because one day that little NerdOctaxe might be the one making you money. 💰⛏️
SoloMinerClinic — where miners get a second opinion before they become archaeological artifacts. 🩺😂

I have 6 NerdQaxe Miners from PowerMining available.
I replaced the VRM on every one of them, so they have already been repaired and tested.
Specs:
Rev. 6 PCB
6 TH
Board fuse
XT30 connector
Stand included
PSU included
Screen included
Free shipping
One thing to know: PowerMining does not install heatsinks on the VRMs or on the back side of the PCB. I recommend adding heatsinks and a small fan to improve cooling and keep the miner running cooler.
I can install the heatsinks and set up a small fan for an additional $15.
These are ready to go.

🩺 Doctor’s Notes — Another Busy Day at the Clinic
Today I had a good day treating four brothers who arrived with acute heart pain. ❤️‍🩹
Unfortunately, all four were diagnosed with the same condition: electrocution trauma. ⚡️
They were admitted to my clinic and received the usual treatment — good hospitality, careful diagnostics, and a little surgery. 😄
All four patients received new heart transplants and have now been moved to the rehabilitation room for observation.
The recovery is going well. If everything stays stable, they will be discharged tomorrow and ready to return to normal life. 🏥➡️🏠
And, as always, my clinic has a few recovered patients available for adoption. 😂
If anyone is interested in taking one or two home, let me know.
🩺 Another successful day at SoloMinerClinic.
We don’t give up on patients — we bring them back to life. ⚡️❤️‍🩹
Update on it.
It is for sale $270 set.
You cover shipping.
I keep warranty for 30 Days.

Guys, please keep track of the packages you ship to me. Once your package is delivered, please message me so I can double-check and make sure I know who it belongs to.
I received another NerdOctaxe with a return shipping label inside the box, but there is no username, no contact information, and no information about where we discussed the problems or agreed on the repair cost.
I cannot simply repair the miner and ship it back using the included label when I don’t know who it belongs to or what repair was requested.
At this point, I have two NerdOctaxe miners with no response from their owners — one from Colorado and another from Jacksonville, Florida.
If you shipped one of these miners to me, please contact me ASAP with your username and the details of your repair.
All of them are healthier than ever before.

All 3 VRMs are new.
Customer doesn’t want to have it anymore.
I sell it for him to get my part paid.
Works well and cool.
If you need any mods, I can do it for you.

I have two rev 6 Nerdqaxe pcbs.
If someone is interested dm me.

There is a NerdEko PCB for sale.
Manufacturer doesn’t know yet the price.
We can send offer.
If someone is interested, let me know.
Only PCB is for sale. ASICS are soldered.

BIG FINDING TODAY! 🚨
To everyone who has a NerdOctaxe with similar mounting holes in the middle — PAY ATTENTION.
I worked on a miner yesterday that suddenly started getting shorted by the screw holding the hydro pump unit.
The miner was screaming like he was getting a 5-liter enema with hot pepper extract. 😂
His eyes were red when he showed me the CURRENT PROTECTION error.
I immediately realized his “gut” was sore from my treatment. 😆
E-ray imaging helped me locate the problematic area very quickly. After some investigation, I finally found the answer to one of my endless lists of questions.
Long story short:
The PCB is designed so that the positive layer runs right next to the mounting hole.
There is only about 1 mm of clearance.
The screws used with the hydro system have a pretty wide neck, and they don’t properly fit down into the mounting hole. When the screw is tightened, it doesn’t need to be tightened very much to damage/scratch the PCB solder mask and create contact between + and −.
And yes — this happened before me. 😬
I finally found the problem and solved it.
Check all the pictures to see exactly where the problem is.
What’s the solution?
The next step is to make a larger backplate for the miner.
The new backplate will be 80 × 80 mm.
The current backplate is designed around the LGA1200 / 1700 standard and is only 76–78 mm, which doesn’t give enough clearance for these wider hydro screws.
With the new 80 × 80 mm backplate, we can position the mounting hole so the wider neck of the screw passes through the opening without coming close to the PCB’s positive layer.
I’m going to make a prototype from aluminum today and test it.
If everything works as expected, I’ll also place an order for custom-made backplates.
If you have a NerdOctaxe with this type of mounting setup, check it before you end up with a CURRENT PROTECTION error and a very angry miner. 😂
If you’re interested in the new backplate or have any questions, let me know!

Finished 6Th 6rev PCB! 🔧
I can ship tomorrow after a final test run.
PCB only is for sale.
I can also sell it with heatsinks already installed and a LILYGO screen and a stand for an additional $$$.
DM me if you’re interested.
✅ 30-day warranty

Decided to assemble a complete 12 TH/s miner since nobody wanted to buy the PCB. 😄
Now it’s upgraded with Thermalright heatsinks, plus three Gamma heatsinks on the back with fans. The cooling results are incredible—the VRM temperatures dropped from 55°C to just 40°C!
It’s also mounted on a space-saving stand, and I can honestly say it’s not loud at all.
Not bad for a miner that almost became a spare PCB! 😎
No PSU.
You pay for shipping.

NerdQX: A Little Capricious Patient
NerdQX from IX-Tech — or at least originally developed by them.
This is the second miner of this model that has landed on my repair table. I have to say, it’s a pretty well-built machine. But at the same time… it’s very capricious. 😄
On both machines, it took me 2–4 attempts to get the VRMs behaving properly. They either run hot or the miner simply refuses to wake up.
This time I managed to replace all three VRMs, but it took way too much time. On the last attempt I basically told the patient:
“Okay. If you don’t work now, I give up.”
And… voilà. Miracle happened. The patient opened his eyes. 👀
Now it is sitting on the IV — pure electricity infusion — under my test script and observation. 🩺⚡
The biggest problem is the PCB itself. Thanks to its heavy copper layers, it dissipates heat so quickly that the solder doesn’t melt completely. My established technique simply failed on this one.
This machine requires a completely different approach.
Overall, I really like the NerdQX. In fact, I would take this machine over the NerdQaxe++ as a replacement.
But, like some patients, it’s a good machine with a very complicated personality. 😄

Just finished working on NerdOctaxe 13.8Th Hydro.
It had 5V LDO dead short. Because of that one trace was lifted and melted. I replaced LDO and restored the trace. It is under PCB UV mask now.
If someone is interested in this machine DM.
I also installed heatsinks on the back of PCB VRM area. So it runs cooler.
Mean Well PSU is included.
Free shipping.

New toy discovered inside the NerdOctaxe! 🌈🩺
I received a NerdOctaxe today for repair and noticed something I had never seen on my table before — RGB connections! 😳
The patient came in with a little extra equipment installed. 😂
Unfortunately, I can’t test the RGB functionality right now because I already shipped one of my own NerdOctaxe miners with the Hydro setup, and that one has the RGB connections too.
So, no diagnosis today — just a medical bulletin:
RGB exists in the NerdOctaxe! 🌈😂
Consider this an official discovery from the NerdOctaxe. The patient is stable, but apparently wants to party. 🩺⚡

🩺 Another NerdQaxe Walked Into the Clinic
Received a NerdQaxe 6rev Solosatoshi today.
The top VRM was lightly melted, and I was a little concerned about removing it without causing more damage to the PCB. It took some time before the patient finally gave up and came loose.
Patience. And only patience. 😄
I cleaned the entire area and replaced a couple of nearby capacitors. The heat around that VRM was extreme, so I didn’t want to leave potentially damaged caps behind.
After everything cooled down, I powered up the patient and ran some tests.
And then… surprise diagnosis. 🩺
The second VRM was overheated too.
This is actually the first time I’ve seen two VRMs fail at the same time on one board. Apparently, one VRM decided not to suffer alone. 😂
I recently had a NerdOctaxe with a similar mystery. After replacing one VRM, I found another one running about 10°C hotter than the others. I replaced that one as well, and the miner became healthier than it had ever been.
Sometimes the patient tells you exactly what’s wrong.
You just have to listen to the temperature. 🌡️🩺

Just finished a NerdOctaxe 12 TH/s.
🔧 PCB only — ready for sale.
If you’d like, I can also order the heatsinks and install them for you.
Original price: $250
Sale price: Corrected today to $170 — free shipping
Message me if you’re interested.