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The screen's Compaq laptop power inverter is often prone to failure, due to the high-levels of voltage necessary to power it. When this occurs, the screen becomes very dark and the image may no longer be visible. Compaq laptop power inverters can be tested to determine if the device requires replacement. In most cases the backlight inverter is universal, meaning that the same backlight lamp will be compatible with a variety of different notebooks. Most Compaq laptop power inverters are interchangeable and will be compatible with other Compaq brand notebooks.
Compaq notebook power inverters are a pen-like circuit board located inside the display panel. It is placed under the LCD screen and has very short connecting wires. Users can access the Compaq notebook power inverter by removing the LCD screen and the screen bezel. The component is equipped with connectors on each end and should be handled with extreme care. One connector of the Compaq notebook power inverter is routed to the LCD screen, and the other to the backlight mounted inside of the screen. If not handled appropriately, the entire screen can be damaged beyond repair.
To verify that Compaq laptop power inverters are receiving power from the motherboard, users can test the unit with a multi-meter. By connecting the positive (+) tip of the multi-meter to pin 1 on the inverter, and the negative (-) tip to the ground located around the screw, users can test their unit's voltage level. Standard Compaq notebook power inverters have a voltage of about 19 volts DC, when receiving power from the motherboard. In the event that the inverter is receiving power from the motherboard and the screen still appears to be dark, the Compaq laptop power inverter's unit may have failed or the backlight has malfunctioned.
If you feel you do not have the technical skills to replace your laptop's LCD inverter, there are many laptop repair services that can be employed to do so. |