About Diagnostack

Last updated: August 2026

Diagnostack publishes step-by-step guides for the technology problems ordinary people run into — slow internet, batteries that die by lunchtime, storage warnings, computers that used to be fast. The goal is narrow and specific: get you to the actual cause of your problem, then tell you exactly what to change.

Who writes this

Diagnostack is written and edited by Younghwan Lee, who works in digital marketing and has spent years building and maintaining websites — which mostly means years of being the person friends and colleagues call when something stops working.

I'm not a certified technician, and this site doesn't pretend otherwise. What it offers instead is method: every guide starts by working out which of several possible causes you actually have, rather than handing you a list of twelve fixes and wishing you luck. Steps are tested on real hardware, and where a claim comes from a manufacturer's documentation, it's linked so you can check it yourself.

You can reach me directly through the contact page.

How the guides are made

Each guide follows the same process:

• Diagnose before prescribing. Most tech advice online is a list of fixes with no way to tell which one applies to you. Every guide here starts with how to identify your specific cause, so you're not working through twelve steps that were never relevant.
• Test on real hardware. Steps are verified on current versions of the software described. Where behaviour differs by version or region, that's noted in the text rather than glossed over.
• Cite the source of truth. Where a claim comes from official documentation — a manufacturer's support page, a standards body, a platform's help centre — we link it so you can check.
• Say when we're not sure. If a fix works for most people but not all, or if the cause is genuinely ambiguous, the guide says so. Confident-sounding advice that turns out to be wrong wastes more of your time than an honest "it depends."

Updates and corrections

Software changes constantly, and a guide written against last year's interface can be actively misleading. Each article carries an "Updated" date, and we revisit the main guides on a regular schedule.

If you find something that's wrong, outdated, or doesn't work on your device, please send a correction. Include your device and software version if you can. Substantive corrections are made to the article itself, and significant ones are noted at the bottom of the page.

How this site is funded

Diagnostack is supported by advertising. Ads are served by third-party networks including Google AdSense, and are clearly separated from the article text. We do not accept payment to review a product favourably, and advertisers have no input into what we write or how we rate anything.

Where an article links to a product, that link is there because the product is genuinely relevant to the fix being described. If any link on this site ever becomes a paid or affiliate link, it will be disclosed on the page it appears on. Full details are in the disclaimer.

What we don't cover

We stay away from medical, legal, and financial advice. Those subjects deserve professionals, and a general-interest tech site is the wrong place for them. We also don't publish leaks, rumours, or "what to expect from the next iPhone" speculation — none of it helps you fix anything.

Contact

Questions, corrections, and business enquiries: use the contact page or email [email protected].