![]() Screen shows strange colors . What could be wrong? I’ve been asked this question many times and today I’m addressing the issue. In this post I explain some basic troubleshooting techniques in case if your screen started showing strange or incorrect colors. You have to know how to disassemble your computer in order to use following troubleshooting techniques. TEST WITH EXTERNAL MONITORThe main troubleshooting step is testing the video output on an external monitor (or TV). You can connect your laptop to an external monitor using VGA cable, DVI cable, HDMI cable or S- Video cable, it depends on a type of connector you have. Most models have a VGA connector, so it would be the most common way to connect. Some laptops detect external monitor automatically and start showing image on both screens right from startup. Other models can detect the monitor but display image only on one screen (internal or external). In this case you’ll have to switch video between internal and external using the Fn key and one of the F* keys in the top row of the keyboard. This combination varies for different brands, for example it’s Fn+F5 for Toshiba, Fn+F4 for HP, Fn+F8 for Dell, Fn+F7 Lenovo etc. Florida T-Shirts Plus PROMOTIONAL PRODUCTS FOR ANY BUDGET: PO BOX 22342 -- Lake Buena Vista, FL 32830 Postal Mailing Address. In this post I explain how I test the inverter board in a laptop. The inverter failure is very similar to the backlight lamp failure. In both cases the screen gets. TheINQUIRER publishes daily news, reviews on the latest gadgets and devices, and INQdepth articles for tech buffs and hobbyists. View and Download Vista Quantum EVO installation and user manual online. Quantum EVO DVR pdf manual download. ![]()
![]() This could be bad connection, bad LCD cable or bad LCD screen. Let’s narrow down the problem one by one. TRY RESEATING LCD CABLE CONNECTOR ON MOTHERBOARDThe screen receives data signal from the motherboard via LCD cable. If the LCD cable not making good connection with the motherboard, it might cause image or color distortion on the screen. Try reseating the LCD cable connector and see if it fixes the problem. Make sure the LCD cable connector plugged correctly. In most laptops the LCD cable connector located under the keyboard bezel (aka keyboard cover). If it’s not there, most likely you’ll find it somewhere under the keyboard. WIGGLE THE LCD CABLEThe LCD cable runs inside the display panel, under the screen. For this test it’s necessary to disassemble the display, so you can access the cable. A pinched or damaged wire inside the cable also can cause color distortion. Wiggle the cable while the laptop is running. If moving the cable affects image on the screen in any way (it starts shown different colors, lines, or image clears to normal, etc. Try replacing the cable. On the other hand, if moving the cable doesn’t affect image at all, most likely the cable is good and you have a failed screen. In this case you’ll have to it with a new one. APPLY SOME PRESSURE TO THE DISPLAYTry applying some reasonable pressure to the top part of the display assembly. Squeeze it with your fingers. If the screen starts showing different colors, lines, or clears to normal when you squeeze the top part of the display panel, most likely this is screen failure. In this case you’ll have to replace the screen. Also, you might be interested in the following posts: Troubleshooting backlight failure. How to test screen inverter. Bad video on the screen. What is wrong? Fix video problems.
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May 2018
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