Revive a stuck LCD pixel

How to fix pixel errors on your LCD monitor

LCD monitors contain millions of pixels, each one composed of three subpixels: red, blue, and green. When all three are on, a pixel looks white. Other combinations create other colors. A pixel can become stuck showing one hue. But you can fix this.

Determine whether the pixel is just stuck or completely dead. If it shows only black, it's probably inoperable. If it shows a solid color, though, it may be stuck, and you may be able to shock it back into operation.

Make sure that your LCD is clean -- spray a few blasts of compressed air, and follow up by wiping with a scratch-free cloth and screen cleaner. Verify that your PC is outputting the image in your LCD's native resolution so you can identify pixels more easily. Open StartoControl Panelo Display, click the Settings tab, and adjust the resolution. (Consult your display's documentation, if necessary.)

Download and install UDPixel to identify and fix the problem. (The utility also requires the .Net Framework, which you can download.)

In UDPixel, increase the Run cycle option to 4 seconds, and click the Run cycle button. The display will cycle through red, green, blue, black, white, and yellow. A stuck pixel should be visible against every hue but the one it's stuck in; unchanging dots are problem areas. Click to stop the color cycle.

For multiple pixels, in­­crease the Flash window number by 1 for each stuck pixel.

Otherwise, click Start; a small, 5-by-5-pixel box will appear. Reposition the box around the stuck pixel, and wait 15 to 20 minutes. Click Reset to turn it off, and repeat the color cycle to see if the pixel has cleared.

If the problem persists, check your LCD warranty to see if you can replace the screen.

If you can't make such a replacement, try applying direct pressure. Wrap the tip of a PDA stylus or similar object in a scratch-free cloth, and use UDPixel to find the trouble spot.

Align the covered tip of the stylus directly over the un­­cooperative pixel. Turn off the screen, and gently (carefully) apply pressure for 5 to 10 seconds. Turn the screen back on, and check the pixel.

If it's still stuck, repeat steps 9 and 10, and even step 7. If you get no results, try wrapping the rounded, plastic end of a marker pen in a scratch-free cloth, and gently tap the afflicted area a few times.

If you're lucky, one of these tricks will revive the pixel.

Join the PC World newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection

Tags lcd monitors

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Zack Stern

PC World (US online)
Show Comments

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Matthew Stivala

HP OfficeJet 250 Mobile Printer

The HP OfficeJet 250 Mobile Printer is a great device that fits perfectly into my fast paced and mobile lifestyle. My first impression of the printer itself was how incredibly compact and sleek the device was.

Armand Abogado

HP OfficeJet 250 Mobile Printer

Wireless printing from my iPhone was also a handy feature, the whole experience was quick and seamless with no setup requirements - accessed through the default iOS printing menu options.

Azadeh Williams

HP OfficeJet Pro 8730

A smarter way to print for busy small business owners, combining speedy printing with scanning and copying, making it easier to produce high quality documents and images at a touch of a button.

Andrew Grant

HP OfficeJet Pro 8730

I've had a multifunction printer in the office going on 10 years now. It was a neat bit of kit back in the day -- print, copy, scan, fax -- when printing over WiFi felt a bit like magic. It’s seen better days though and an upgrade’s well overdue. This HP OfficeJet Pro 8730 looks like it ticks all the same boxes: print, copy, scan, and fax. (Really? Does anyone fax anything any more? I guess it's good to know the facility’s there, just in case.) Printing over WiFi is more-or- less standard these days.

Ed Dawson

HP OfficeJet Pro 8730

As a freelance writer who is always on the go, I like my technology to be both efficient and effective so I can do my job well. The HP OfficeJet Pro 8730 Inkjet Printer ticks all the boxes in terms of form factor, performance and user interface.

Michael Hargreaves

Windows 10 for Business / Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?