Supreme Tech — Technology Solutions & Repair
diagnostic evaluation
No Diagnostic Fee
Walk-Ins Welcome

Computer Diagnostics in Rancho Cucamonga

From slow performance and random crashes to complete data loss and liquid damage — we run a thorough diagnostic on every device before any repair. No diagnostic fee, ever. Walk in or call ahead.

Free

Diagnostic — No Fee

1–2 hr

Typical Turnaround

30+

System Checks

100%

Transparent Reporting

What We Diagnose

Comprehensive Diagnostic Services

Every diagnostic covers the full picture — hardware, software, board-level, and data. Click any service to learn more.

Free

Performance Assessment

Full hardware and software speed analysis — CPU benchmark, RAM stress test, drive throughput, and boot time profiling. We pinpoint exactly what's slowing your machine down and give you a clear action plan.

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Free

Motherboard Diagnostics

Board-level inspection covering power stages, charging circuits, POST failures, BIOS corruption, and individual component testing. We identify failing capacitors, MOSFETs, and ICs before they cause catastrophic failure.

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Free

Hard Drive & SSD Health Check

S.M.A.R.T. analysis, bad sector scan, read/write speed testing, and firmware health check for HDDs and SSDs. Catch drive failure early before you lose data.

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Free

Liquid Damage Assessment

Microscopic inspection of motherboards and components for corrosion, oxidation, and short circuits caused by water or liquid contact. Includes ultrasonic cleaning evaluation and component triage.

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Free

No-Power / Dead System Diagnostics

Won't turn on at all? We run voltage rail checks, power supply load testing, and board-level continuity tests to determine if the issue is the PSU, power circuit, or a shorted component.

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Free

Thermal & Overheating Diagnosis

Temperature profiling under load for CPU and GPU, fan speed validation, thermal paste condition check, and heatsink integrity inspection. Prevents shutdowns, throttling, and premature hardware failure.

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Free Eval

Data Recovery — Drive Imaging

When a failing drive is at risk of total loss, we create a sector-by-sector forensic image before any recovery attempt. Supports HDDs, SSDs, laptops, and external drives with encrypted or partially readable media.

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Advanced

Data Recovery — Chip-Off Service

For physically destroyed or unreadable NAND flash chips, we desolder the memory chip directly from the board and read it with specialized hardware. Used for SSDs, USB drives, phones, and tablets when all other methods fail.

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Free

Security & Malware Scan

Deep system scan for rootkits, trojans, ransomware, keyloggers, and PUPs. We also audit startup entries, scheduled tasks, browser extensions, and network connections for signs of compromise.

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Free

RAM Diagnostics

Extended memory stress testing using multi-pass algorithms to detect intermittent RAM errors that cause crashes, freezes, and blue screens. We identify the specific failing module and slot.

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Free

System Optimization

Startup program audit, background process cleanup, registry optimization, driver updates, and Windows/macOS tuning. Designed to maximize performance on existing hardware without new parts.

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Free

Gaming PC Diagnostics

Specialized GPU stress testing, VRAM error detection, PCIe slot integrity check, and game crash log analysis. We diagnose unstable framerates, driver crashes, artifacts, and thermal throttling on gaming rigs.

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30+ Point Checklist

What We Check on Every Device

Our diagnostic process covers hardware, software, thermal, and data integrity — giving you a complete health report with actionable recommendations before we touch anything.

CPU benchmark & thermal profiling
RAM multi-pass stress test
Hard drive S.M.A.R.T. & sector scan
Battery health & cycle count
GPU load & VRAM integrity test
Network adapter & port testing
Power supply voltage rail check
Motherboard POST code analysis
USB controller & port testing
Display panel & backlight check
Fan speed & airflow validation
Software conflict & driver audit

Chip-Off Data Recovery

When a storage chip is physically destroyed or completely unresponsive, we remove it directly from the circuit board and read it with specialized imaging hardware. This is the method of last resort for SSDs, phone storage, and USB drives when all other options fail.

Drive Imaging & Data Recovery

Before any repair on a failing drive, we create a sector-by-sector forensic image to preserve every recoverable bit. We then work from the image — never the original — to maximize recovery rate and protect data integrity.

PC Tune-Up After Diagnostics

Once diagnostics are complete, we can perform a full optimization: malware removal, startup cleanup, driver updates, thermal paste refresh, and system tuning. Contact Supreme Tech for an estimate — only if you approve.

Bring It In — Diagnostic Is Free

Walk in or call ahead. We'll run a thorough diagnostic, give you a clear written report, and explain every option — no pressure, no fee.