Hi, I've a problem with my laptop screen. It has some horizontal lines that keep on flickering at the bottom near the taskbar. I've observed that its the top portion of the desktop that keeps appearing in those lines. It was some 5 lines till yesterday, now a new line has appeared in the middle of the taskbar.
I use a Compaq laptop.
System Model:Compaq Presario CQ45 Notebook PC
Processor: AMD Turion(tm) X2 Dual-Core Mobile RM-72, 2100 Mhz, 2 Core(s), 2 Logical Processor(s)
ATI Radeon HD 3200 Graphics
Adapter Type: ATI Radeon HD 3200 Graphics (0x9612), ATI Technologies Inc. compatible.
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The controller board for the screen is going bad. check shopjimmy.com for replacement parts. It's not a difficult job to do. Once the back of the TV is removed, you'll see it near the center of the screen.
I've seen this many times (red or pink lines) on an LCD screen when the video chip is over-heating... When is the last time you blew the dust out of the heatsink/fan area? Get some canned air and blow it out. Unless it's plugged really bad, the fan has died, or there has been permanent damage to the system, this should clear things up. Also, make sure you are using the laptop on a HARD surface, not actually on your lap, a pillow, couch, cloth covered table, etc. It needs airflow to keep it cool...
This is usually a sign of either a bad LCD screen cable, a bad LCD screen, or a bad display adapter. If you connect an external monitor & you get a picture without these red horizontal lines, then your display adapter is OK. Diagnosing a bad LCD screen cable or a bad LCD screen requires that you disassemble the LCD screen panel, & swap them one at a time with a matching part. This way you can identify which part is causing the problem & replace it.
Many times we notice the symptoms of the problems and try to remedy them instead of the original problems. As such, your monitor was likely not the culprit. A necessary first step in the diagnosis process. Since the new monitor is reacting the same way, I would state that the connection/connector or the video card (integrated) is the culprit. Since it is just the bottom, I would go for the connector may have a cold solder joint or bad connection.
Your Bulb is DUE, you need to change it, Don't do it your self contains mercury. Your LCD is good IF you do not have bad PIXELS. This white and pink lines shows as pixel problem but it migth also short on LCD, if you placed something heavy on Laptop. You may remove and sent the LCD for repair or all laptop to tech.
You may also need to check inverter. I give service around the Country but it is up to you. My company name is JMC TECHS INC. Registered in Miami Florida. (Check SUNBIZ.com) jmctechinc@gmail if you like to contact me.
It appears the video cable connector needs to be seated properly, it may be loose. The connector would be located near to bottom of the screen on the motherboard between the hinge and the top edge of the keyboard.
Depending upon the model of the laptop there is a plastic panel which houses push buttons and indicator lights that is located between the top edge of the keyboard and the bottom of the LCD screen. There are screws at the bottom of the laptop and possible screws on the back next to the hinge securing this panel. This panel would also have small plastic retaining clips locking it into place. You need a thin blade to lift this panel up, be careful not to crack the panel.
Once you remove this panel you see this video connector and cable. the connector may also be held in place with a screw and plate.
The flickering screen indicates that it is a backlight problem with either a faulty inverter or inverter connection problem. The inverter is usually located at the bottom edge of the LCD screen, and may have one or two connectors (one for the video info. and one for the inverter power or a combined connector) attached to the motherboard under the case near the top edge of the keyboard near the hinges. Reseating these connectors may solve your problem.
Horizontal lines on bottom third of my Toshiba (Satellite Pro) Laptop with XP windows got fixed by flicking my finger on the laptop screen! Was it a loose connection? I don't know. Change of screen resolution did not help, Rebooting, did not help nor restoring to prior dates. Thank you guys.