When your computer stops working, it’s not always obvious what’s wrong. Mount Vernon Computers provides professional hardware diagnostics for homes and businesses across Alexandria. We use specialized tools and years of hands-on experience to pinpoint failing components — motherboards, RAM, hard drives, power supplies, and more — then replace them with quality parts so your system runs reliably again.
From a clicking hard drive to a motherboard that won’t post, we’ve seen it all. Our on-site service throughout Alexandria and Northern Virginia means you don’t have to haul your computer to a shop and wait days for answers. We come to you, diagnose the problem on the spot, and get your machine back in working order — often in a single visit.
What sets us apart
Pinpoint Diagnostics
We use professional tools to identify exactly which component is failing — no guesswork, no unnecessary replacements.
On-Site Service
We come to your home or office in Alexandria with the tools needed to diagnose and repair on the spot.
Honest Assessments
You’ll get a clear explanation of what’s wrong and whether repair makes financial sense — before any work begins.
What We Diagnose & Repair
Hard drive & SSD failures
We test for bad sectors, failing drives, and data corruption — and replace drives while preserving your files whenever possible.
Power supply replacement
Random shutdowns and failure to power on often point to the power supply. We test and replace them on-site.
Motherboard diagnostics
No POST, beep codes, or dead ports? We diagnose motherboard-level issues and advise on repair vs. replacement.
RAM testing & upgrades
Blue screens and random crashes can stem from faulty memory. We test each stick and replace or upgrade as needed.
Fan & cooling system repair
Overheating causes throttling and shutdowns. We clean, replace fans, and reapply thermal paste to restore proper cooling.
Graphics card troubleshooting
Display artifacts, crashes during games, or no video output — we diagnose GPU issues and replace cards when needed.
Port & connector repair
Loose USB ports, broken HDMI, or a damaged charging jack — we repair or replace damaged connectors.
BIOS & firmware issues
We resolve boot failures, BIOS corruption, and firmware update problems that prevent your system from starting.
Honest Diagnostics, No Guesswork
We never replace parts without confirming the diagnosis first. You’ll get a clear explanation of what’s wrong, what it costs to fix, and whether a repair makes financial sense — before any work begins.
What customers say
Daryl is a phenomenal resource. He is competent and professional, but very personable. He has never shamed me for my occasional (OK, frequent) ignorant questions about my software nightmares. He just patiently explains the concept and informs me of my options. He then works with blazing speed and before I know it, I am back in business. You will not be sorry if you use his services.Read full review
Mount Vernon Computer Repair has always had great service for me and my family. We can rely on Daryl to fix, check and update our computer systems for the last 3 years! I highly recommend Daryl to all my friends and family.Read full review
I can’t say enough great things about this computer repair shop! They delivered my PC right to my door, which was such a convenience. From start to finish, the customer service was outstanding — friendly, professional, and incredibly helpful.Read full review
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Tell us what’s going on and where you’re located. We’ll confirm availability and get you back up and running fast.