TL;DR
- A good share of “broken” laptops turn out to be a bad charger, a stuck power state, or a software fault you can fix for free.
- Whether you want to know how to repair an HP laptop, a Dell, or any other brand, the first five checks are the same.
- Safe Mode tells you in minutes whether the problem is Windows or the hardware itself.
- Lines on the screen mean different things depending on whether they move when you tilt the lid.
- Check your warranty before paying anyone, because a covered repair costs nothing.
What to Check Before You Pay for Laptop Repair
Run five checks in order: power, screen, Safe Mode, external display, and warranty. Together they take about twenty minutes and cost nothing. They often find the problem, and when they don’t, they tell a repair shop exactly where to look.
Do these in order. Each one rules something out, so skipping ahead wastes your time.
Step 1: Rule Out Power First
Plug in the charger and look for a small light on the laptop or on the charger brick. No light means the problem is likely the charger, the outlet, or the charging port rather than the laptop itself.
Then do a power reset. Unplug the charger, hold the power button down for 30 seconds, plug the charger back in, and try again. This clears a stuck power state, and it revives laptops that seemed completely dead more often than people expect.
If you have a spare charger of the same type, try it. Chargers fail far more often than laptops do.
Step 2: Find Out If the Screen Is Dead or Just Dark
Turn the laptop on in a dark room and shine a flashlight at the screen from an angle. If you can faintly see the Windows desktop or a logo, the laptop is running fine and the backlight has failed. That’s a different repair from a dead screen.
Also listen. A fan spinning up and lights coming on means the machine is powering up even if you see nothing.
Next, plug the laptop into a TV or monitor with an HDMI cable. If a picture appears on the external screen, the laptop works and the problem is in the display, the cable behind the hinge, or the backlight.
Step 3: Read What Screen Lines Are Telling You
Lines on a laptop screen point to two very different problems, and one simple test separates them.
Open and close the lid slowly while the laptop is on. If the lines flicker, change, or disappear as the lid moves, the display cable running through the hinge is loose or damaged. That’s often a cheaper repair than a new screen.
If the lines stay exactly the same no matter how you move the lid, the panel itself has failed and needs replacing. Our guide to dead pixels and screen faults covers how to tell panel damage from other issues.
Cracked glass with spreading black ink patches always means a new panel. Nothing repairs a cracked LCD.
Step 4: Fix Sticky Keys the Safe Way
Sticky keys usually come from something spilled or dropped between the keys. Shut the laptop down first, then hold it upside down and use short bursts of compressed air along the key rows from a few inches away.
For a sticky spot after a spill, dampen a cotton swab with isopropyl alcohol, squeeze out the excess so it isn’t wet, and clean around the edges of the affected key. Alcohol dries quickly and doesn’t leave residue the way water does.
Don’t pry keycaps off unless you’ve done it before. The small plastic clips underneath snap easily, which turns a free cleaning into a parts order. Our guide to laptop keys not working goes deeper on this.
Step 5: Use Safe Mode to Separate Software From Hardware
Safe Mode starts Windows with only the basic drivers loaded. If the laptop behaves normally there, your hardware is fine and the fault is in software, which is usually cheaper and sometimes free to fix.
To reach it, hold Shift while clicking Restart, then choose Troubleshoot, Advanced options, Startup Settings, Restart, and press 4 for Safe Mode.
If the laptop crashes, freezes, or shows the same fault in Safe Mode, the problem is hardware. Note exactly what happens and when, because that detail saves diagnostic time later.
How to Repair an HP Laptop or Any Other Brand: Check the Warranty First
Before paying anyone, find out whether the manufacturer already covers it. Every major brand lets you check coverage using the serial number or service tag printed on the bottom of the laptop.
- HP owners can check coverage and run brand diagnostics through HP Support.
- Dell owners can enter their service tag at Dell Support to see warranty status and driver updates.
- Windows users of any brand can find official troubleshooting steps at Microsoft Support.
This takes two minutes and occasionally saves the entire cost of the repair.
What You Shouldn’t Try Yourself
Three jobs go wrong far more often than they go right at home. Opening the case to replace a screen risks tearing the ribbon cable, which turns one repair into two. Prying keycaps breaks clips. And anything involving a swollen battery, which looks like a bulging case or a trackpad that no longer clicks properly, should go straight to a shop rather than being handled at home.
Laptop Repair in Sterling, VA: What to Expect at PC Mobile
PC Mobile has handled laptop repair for Loudoun County customers since 2013. Tell us what the checklist showed and it saves us diagnostic time, which usually saves you money.
Every repair carries a 30-day warranty on parts and labor. If the fix is something simple you could do yourself, we’ll tell you rather than charge for it.
We also handle cracked laptop screens and laptop battery replacement. See all computer repair services.
Related reading: laptop keys not working, the truth about dead pixels, loose laptop hinges, and Xbox troubleshooting checks.
Frequently Asked Questions About Laptop Troubleshooting
How do I know if my laptop problem is hardware or software?
Start the laptop in Safe Mode. If it runs normally there, the fault is in software. If the same problem appears in Safe Mode, it’s hardware. This one test narrows down most laptop faults in a few minutes.
My laptop won’t turn on at all. What should I try first?
Check for a charging light, then do a power reset by unplugging the charger, holding the power button for 30 seconds, and plugging it back in. Try a different charger if you have one, since chargers fail more often than laptops.
What causes lines on a laptop screen?
Lines that change when you move the lid usually mean a damaged display cable in the hinge. Lines that stay identical regardless of lid position mean the panel itself has failed and needs replacing.
How do I repair sticky keys on a laptop?
Shut it down, turn it upside down, and use short bursts of compressed air along the keys. For spills, clean around the key edges with a barely damp isopropyl alcohol swab. Avoid prying keycaps off, since the clips underneath break easily.
Can a cracked laptop screen be repaired without replacing it?
No. A cracked LCD panel can only be replaced, not repaired. If the crack shows spreading black or colored patches, the panel is damaged internally and a new one is the only fix.
Is it worth repairing an old laptop?
A good rule is to repair when the cost stays under roughly 25 percent of what the laptop is worth today. If several things are failing at once, replacement usually makes more sense.
Still Stuck After the Checklist? Bring It In
If you’ve worked through these steps and the laptop still isn’t right, bring it by with a note on what you tried. We’ll diagnose it and give you a price before any work starts.