The Purpose of a Laptop Screen Inverter | Laptops and Notebook
Usually located underneath the plastic shell of your laptop’s screen casing is a small piece of circuit board and it is probably the cause of one of the most common problems related to screen failure and, more specifically, dimness, or darkness to the screen itself.
Giving power to the backlight is considered as the main purpose of the inverter. When it comes to the way it works, it is actually simple because it takes power from the laptop itself by a small inverter lead that runs from the motherboard of the laptop, sometimes it is a direct lead on it’s own, other times this lead can be connected into the inverter through the LCD cable (the lead that runs from the motherboard to the back of the screen itself), giving the screen its visual display.
Most of the time, the lead that gives the left end of the converter power is then plugged into a small white socket and from the other end, usually the right side, the backlight lead from the screen is plugged into another white socket. The backlight also refers to a very small, thin, long, very delicate light bulb that runs along the very bottom or sometimes the side of the screen.
The dimness or darkness to the screen in most cases or flickering of the backlight are the problems related to the inverter. Although not usually, there are also times when it can stop the screen from working at all. When it comes to laptop screens, a common fault is a dark or dim screen but it is generally assumed that it is the backlight that is at fault, sometimes this may be correct but more often or not it is simply the inverter not working, or not giving the backlight the power it needs. Because the backlight is very fragile and can be easily broken, the inverter is usually cheaper to replace than the backlight. On some occasions a repair of the inverter is possible, although usually labour charges on fixing the inverter can sometimes lead up to being more expensive than simply replacing it.
When it’s time to buy an inverter, what most companies will require is the part number which is usually printed on a bar code on the outside of the inverter but sometimes you may need to look carefully to find it. Being lucky would mean getting away with just stating what your laptop make and model is, for example ‘I have an IBM Thinkpad T22 and I need an inverter’ but even though we try our hardest to locate the inverter with just these details, sometimes you will need to provide the part number here is an example of a part number from the inverter for an IBM Thinkpad T22, (10L1402). All three laptops as a whole are basically the same apart from the processor and this inverter is also compatible with the IBM T21 and T20.
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