How to replace 15,6" and 16" CCFL matrix with LED matrix in notebooks ASUS, Lenovo and Acer
Current method is mainly used to replace lamp matrix 15.6" and 16", such as Samsung LTN160AT01, instead of it you can connect Samsung LTN160AT06, or matrix of other manufacturers compatible to parameters and resolution.
To replace CCFL matrix with LED one you need to use a special adapter. Just put in a search field the following text "ccfl to led converter" on any Internet shop such as eBay in order to find and buy it.
This adapter is connected instead of an inverter in a notebook. It is necessary to connect it properly. In this article, we describe the right order of steps to properly connect this adapter.
When connecting the adapter one thing is of utter importance: despite the fact that the board of the adapter has specific markings, do not try to connect it without doing measurements even if the inverter's power connector is seemingly compatible with adapter connector. In 95% of cases, the information on the markings is far from reality. And if you connect without measuring, in best case scenario, the notebook will not run, and in the worst possible outcome it'll cause damage to the notebook as well as to the matrix adapter.
So, to connect the adapter, you must:
- Select the appropriate connector on the adapter, the one that fits best for the connector on the inverter (this is done on a notebook with no battery and no power supply).
- Once the connector is selected, proceed to take the measurements. Usually, the connector for the inverter has 4 wires: positive, negative, turn on/off the backlight and brightness control. We need to define them correctly to connect to the appropriate pins in the connector, which we picked up in the first step. Firstly, determine the negative on the notebook. To do this, set the tester to "continuity test" then defined on the notebook where the negative can be (e.g. screws that hold the circuit board), here we pinch the first probe. Using the second probe define negative on the connector for the inverter (tester starts beeping or displays "short circuit"). After determining the negative (there may be one or two wires), gently pull it (them) out of the socket and mark it(them), for example, with adhesive tape or marker.
- Next, you must find the positive on the ribbon cable connector. Note: here we need to be very careful, because it is necessary to work with the notebook on! Insert the adapter into the matrix on one side and to the notebook on the other. It's not needed to connect to the inverter's connector! Now, connect notebook to the charger and turn it on. After it's turned on the image matrix will be barely visible (no sharp image, because we have not yet connected the backlight). Put the tester in voltmeter mode, then connect one probe to negative, the one we have identified in the second step, and with the second probe we are looking for positive on the connect (usually it's 19 volts, if the notebook is using the power supply). Once you find it, turn off the notebook, disconnect this wire from the connector and mark it.
- Then we determine the two signal wires. First one is responsible for "backlight on", the second - for "brightness". Turn on the notebook, set the tester to voltmeter mode and connect one of the probes to the negative, with the second probe we conduct the measurements. The tester should show about 1.7-3.3 volts. There should be two of those wires. Once found, turn off the notebook and pull them out of the connector, then mark them. Now pull out all the remaining wires if there are any (we won't need them).
- Once we have found and marked the necessary 4 wires, we have them connected to the inverter connector so that after the inverter is connected to the adapter, which is covered in the first step, the wires should coincide: negative to negative, positive to positive, backlight to backlight, brightness to brightness. Small detail, the signal wires (backlight on/off and brightness control) are necessary to determine experimentally (to determine which one is responsible for "brightness" and which for "backlight"). Those who seek will find. If you get them wrong, nothing irreversible will happen, notebook matrix will have backlight, but brightness adjustment won't work properly. Next time just swap the signal wires in the connector. Below in the picture you'll see marked wires on adapter's connectors.
After the procedure, the adapter fits neatly between the matrix and the lid of the notebook.
One possible scenario of an adapter procedure (in pictures):
As a result you get a matrix with LED backlight, which is much better than similar CCFL backlight. Firstly: LED matrix consumes much less power, thus saving your battery and increase the battery life of the notebook. Secondly: LED color reproduction is much better and more evenly distributed than CCFL (darker colors are more saturated, white color is brighter). Thirdly: matrices with CCFL backlight have shorter lifespan since over time they begin to emit dimer light and, eventually, in few years they just stop working. But the main argument is that cost of matrices with LED backlight is 2-3 times smaller than similar ones with CCFL backlight.