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The little bit of circuit board, which will be usually found underneath the plastic cover of your notebooks screen casing, might be the reason for certainly one of the most typical issues related to screen failure and, more specifically, dimness, or darkness to the screen it self. 

The main intent behind the inverter is actually to give power to the backlight. The way it works is straightforward, it takes energy from the laptop itself by a small inverter lead that runs from the motherboard of the laptop, sometimes it's an immediate lead on its own, other times this lead may be linked 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. 

At one end of the inverter, usually the left end, the lead that provides it energy is plugged into a little white socket and from the other end, usually the proper side, the backlight lead from the display is plugged into another white socket. The backlight is just a very small, thin, long, very fine lamp that runs along the very bottom or sometimes the side of the screen. 

The issues linked to the inverter is dimness or darkness to the screen typically or flickering of the backlight. Sometimes it could stop the screen form working at all however not generally. A typical fault with laptop monitors is a dark or gray display, broadly speaking it is assumed that it's the backlight that is at fault, often this can be proper, however more regularly or not it is just the inverter not operating, or not providing the backlight the energy it needs. The inverter is usually cheaper to restore compared to the backlight, because the backlight is very delicate and may be easily broken. On some occasions a restoration of the inverter is achievable, though generally labour charges on repairing the inverter will often lead as much as being higher priced than simply replacing it. 

When it comes to getting an inverter most organizations will need the part number which is usually printed on a bar code on the surface of the inverter but sometimes you will need to look carefully to find it. If your lucky then you may get away with just stating what your laptop make and type is, for example I have an Thinkpad T22 and I need an, we try our hardest to discover the inverter with just these details, however sometimes you'll need to provide the part number; here is an of a number from the inverter for an Thinkpad, (10L1402). This inverter can also be appropriate for the IBM T21, and T20 all three notebooks as a whole are essentially the same aside from the processor. [http://www.cheapgpsdeals.org/sports-gps/garmin-forerunner-305-sale quality garmin forerunner 305 best price]