IceRiver KS1 / KS2 Repair — Professional Kaspa Miner Repair by D-Central

The IceRiver KS1 and KS2 are the mid-range workhorses of the Kaspa mining ecosystem. The KS1 delivers approximately 1 TH/s at 600W, while the KS2 doubles that to 2 TH/s at 1,200W — serious hashpower in a compact form factor that bridges the gap between desktop KS0 units and full-rack KS3 machines. These miners brought institutional-grade kHeavyHash performance to small and medium operations, and thousands of them are now running in home setups, small farms, and co-location facilities across North America and beyond. But like any ASIC miner running 24/7 under load, the KS1 and KS2 develop failure modes — fan bearings wear out, hashboards degrade, power delivery components fail, and firmware issues accumulate over time.

D-Central Technologies has been repairing ASIC miners since 2016. As Canada’s leading mining repair shop — the original Mining Hackers — we have expanded our board-level repair expertise to cover IceRiver’s full Kaspa mining lineup. Our technicians have hands-on experience with the KS1 and KS2 platforms: the hashboard architecture, the cooling system design, the power delivery topology, and the control board diagnostics that separate a quick fix from a full rebuild.

IceRiver KS1 / KS2 Specifications

Specification	KS1	KS2
Algorithm	kHeavyHash (Kaspa)	kHeavyHash (Kaspa)
Hashrate	~1 TH/s	~2 TH/s
Power Consumption	~600W	~1,200W
Efficiency	~0.60 W/GH	~0.60 W/GH
Input Voltage	200-240V AC	200-240V AC
Connectivity	Ethernet	Ethernet
Cooling	Dual fan air-cooled	Dual fan air-cooled
Noise Level	~55 dB	~65 dB
Dimensions	370 x 195 x 245 mm	400 x 195 x 290 mm
Operating Temperature	0-35 C	0-35 C

Common IceRiver KS1 / KS2 Issues and Symptoms

The KS1 and KS2 share a similar architecture scaled to different power levels. As these miners age past their warranty periods and accumulate thousands of hours of continuous operation, certain failure patterns emerge consistently. Here are the most common issues we diagnose and repair at D-Central:

Fan Failures

The KS1 and KS2 rely on dual fans for all thermal management — when a fan degrades or fails, the entire thermal equation breaks down. Symptoms include abnormal fan noise (grinding, clicking, or high-pitched whine), fan speed warnings in the dashboard, thermal throttling even at moderate ambient temperatures, or complete thermal shutdown. Fan bearings are a wear item — after 12-18 months of continuous operation, degradation is common. A failed fan does not just reduce airflow; it can cause uneven cooling across the hashboard, creating thermal hotspots that accelerate chip degradation. We replace fans with OEM-quality units rated for the correct airflow and static pressure specifications, and test the fan controller circuitry to ensure proper speed regulation.

Hashboard Issues

Hashboard failures are the most costly and complex KS1/KS2 repair we perform. Symptoms include reduced hashrate (the miner reporting significantly less than its rated 1 TH/s or 2 TH/s), one or more hashboards not being detected by the control board, abnormal chip counts in the diagnostic logs, or the miner failing to start mining entirely. Root causes range from individual ASIC chip failures (thermal stress, voltage spikes, manufacturing defects) to damaged signal traces, faulty voltage regulators, failed temperature sensors, or degraded solder joints from repeated thermal cycling. The KS1 and KS2 hashboards use IceRiver’s proprietary kHeavyHash chips — component-level repair requires understanding the specific signal chain and voltage domain layout of these boards.

Power Delivery Problems

The KS1 draws 600W and the KS2 draws 1,200W — substantial power loads that stress every component in the power delivery chain. Symptoms include the miner not powering on, intermittent shutdowns under load, hashrate instability, or visible damage to power connectors. Common causes include degraded or burnt power connectors (often from loose connections that generate heat over time), failed internal voltage regulation components, capacitor degradation from sustained high-temperature operation, or issues with the external power supply. Running on unstable input voltage or an undersized circuit is a frequent contributing factor.

Overheating

The KS1 and KS2 generate significant heat — 600W and 1,200W respectively — and depend entirely on forced-air cooling to stay within safe operating temperatures. Overheating manifests as thermal throttling (hashrate drops as chips get hot), thermal shutdown errors, or gradual performance degradation over weeks as thermal paste dries out and heatsink contact degrades. Contributing factors include dust accumulation on heatsinks and fans, degraded thermal interface material between chips and heatsinks, blocked airflow (placing the miner too close to walls or other equipment), and operating in ambient temperatures above 35 C. Chronic overheating is the leading cause of premature chip failure on these units.

Network Drops and Control Board Issues

The control board handles hashboard communication, network connectivity, pool configuration, and fan control. When it fails, symptoms range from intermittent network disconnections (the miner drops off the pool and reconnects repeatedly), inability to access the web interface, failure to detect hashboards, or complete inability to boot. Causes include firmware corruption from power surges or interrupted updates, degraded NAND flash storage, a faulty Ethernet port, or loose ribbon cable connections between the control board and hashboards. Intermittent detection issues — where hashboards appear and disappear — are often caused by cable connection problems rather than board-level faults.

Our Repair Process

Every IceRiver KS1 and KS2 that arrives at our Laval, Quebec facility goes through a systematic repair workflow:

1. Intake and Visual Inspection

We log your unit, photograph its condition, and perform a thorough visual inspection — checking for burnt connectors, corroded components, physical impact damage, dust accumulation, fan blade condition, and heatsink integrity.

2. Full Diagnostic Testing

We power the unit on our test bench with calibrated power supplies and run complete diagnostics: chip enumeration on each hashboard, voltage domain measurements, temperature sensor validation, fan speed testing, control board communication checks, network connectivity verification, and firmware status. This identifies every fault — not just the obvious one.

3. Detailed Quote

You receive a clear breakdown of every fault found, the repair work required, the cost, and the estimated turnaround time. No surprises. You approve the repair before we touch a soldering iron.

4. Board-Level Repair

Our technicians perform component-level repairs: ASIC chip replacement, voltage regulator repair, signal trace repair, temperature sensor replacement, fan replacement, power connector repair, thermal paste reapplication, heatsink reattachment, firmware reflashing, and control board repair. We use quality replacement components and professional rework stations.

5. Post-Repair Testing

Every repaired unit is run through an extended burn-in test — sustained operation at rated hashrate with temperature monitoring, power consumption verification, and stability confirmation across all hashboards. We do not ship a miner until it passes our quality benchmarks.

6. Return Shipping

Your repaired KS1 or KS2 is securely packaged and shipped back to you with documentation of all work performed.

Repair Pricing

Repair costs for the KS1 and KS2 vary based on the nature and extent of the fault. Diagnostics start at $65 CAD, and typical repairs range from $65 to $300 CAD — from simple fan replacements and firmware reflashes to complex multi-chip hashboard repairs. We provide exact quotes after diagnostic testing — no guesswork, no hidden fees. For a rough estimate before sending your unit, use our ASIC Repair Cost Estimator.

Why D-Central for IceRiver KS1 / KS2 Repair

8+ years of ASIC repair experience. We have been repairing cryptocurrency miners since 2016 — from Antminer S9s through the latest generation hardware. We understand ASIC architecture, thermal management, power delivery, and board-level diagnostics across every major platform.

IceRiver and Kaspa mining expertise. As IceRiver KAS miners move past warranty and into the secondary market, D-Central is building the deepest IceRiver repair knowledge base in North America. We service the entire KS lineup — from the compact KS0 to the full-size KS3 and KS5 series.

Board-level repair capability. We do not just swap boards — we diagnose and repair at the component level. This means lower cost to you and less waste. If a single chip or voltage regulator is the problem, we fix that component rather than replacing the entire hashboard.

Canadian quality, North American turnaround. Our repair facility is in Laval, Quebec. No shipping overseas. No customs delays on returns. Fast, transparent service from a Canadian company you can reach at 1-855-753-9997.

Transparent process. Full diagnostic report and quoted price before any repair begins. No hidden charges. No unnecessary replacements. You approve everything before we proceed.

Post-repair warranty. Every repair comes with a warranty on the work performed. If the same issue recurs within the warranty period, we make it right at no additional cost.

Frequently Asked Questions

What is the typical turnaround time for a KS1 or KS2 repair?

Most KS1 and KS2 repairs are completed within 5-10 business days after we receive your unit. Simple issues like fan replacements or firmware reflashes can be done in 1-2 days. Complex hashboard repairs involving multiple chip replacements may take up to 2 weeks depending on parts availability and repair queue volume. We provide an estimated timeline with your quote.

My KS2 hashrate has dropped by half. Is it a hashboard failure?

A 50% hashrate drop on a KS2 strongly suggests one hashboard is not operating correctly. Check the miner web interface — it should show individual hashboard status and chip counts. If one board shows zero or significantly reduced chips, that board needs repair. However, similar symptoms can also be caused by thermal throttling (check temperatures), a loose hashboard cable connection, or a power delivery issue. If a simple reboot and cable reseat do not resolve it, send it to us for proper diagnosis.

Can I send just a hashboard for repair, or do I need to send the whole miner?

Both options work. If you have already identified the faulty hashboard through the miner diagnostic interface, you can send just that board — it saves on shipping costs and weight. If you are not sure which component is at fault, send the complete miner and our diagnostics will identify everything. We also repair control boards individually if needed.

How do I ship my KS1 or KS2 to D-Central?

Contact us first to initiate a repair request. Pack your miner securely in its original packaging if possible, or use a sturdy box with ample foam padding. Remove the power cable unless you suspect the PSU is part of the issue. Include a note describing the symptoms. Ship to our facility in Laval, Quebec. Use a tracked, insured shipping service — these are valuable machines.

Is it cost-effective to repair a KS1 or KS2?

In most cases, yes. The KS1 and KS2 are mid-range miners with significant value, especially given the Kaspa network growth. A fan replacement or firmware reflash costs far less than a new unit. Even chip-level hashboard repair is typically worthwhile — our repair costs range from $65 to $300, well below the replacement cost of these machines. We always provide an honest assessment. If the repair does not make financial sense, we tell you upfront and you only pay the diagnostic fee.

My KS1 keeps dropping off the network. What should I check before sending it in?

Network drops are common and not always hardware-related. Before sending your KS1 in for repair, try these steps: check the Ethernet cable and try a different one, try a different port on your router or switch, check if your router is assigning a stable IP via DHCP reservation, try updating the firmware to the latest version, and monitor whether the drops correlate with temperature spikes. If the problem persists after ruling out network equipment and firmware, it may be a control board issue — specifically the Ethernet port or the board’s network controller. Send it to us for diagnosis.

Get Your IceRiver KS1 / KS2 Back Online

Every hour your KS1 or KS2 sits idle is Kaspa hashrate you are not earning. D-Central has the expertise, the parts inventory, and the proven process to diagnose and fix your IceRiver miner at the component level — fast, transparent, and backed by warranty. We are the Mining Hackers — this is what we do.

Contact D-Central for a repair quote or call us at 1-855-753-9997.

Looking for repair services for other IceRiver models? See our KS0/KS0 Pro Repair, KS3/KS3L/KS3M Repair, and KS5L/KS5M Repair pages, or visit our ASIC Repair hub for the full list of miners we service.