I am not electrically savvy person but I have general idea of what some things are and what they do. I have this nice computer video card that has a broken transistor on the back side and is not working. The reading on it is K1P Z4. I did some googling and some online catalogue searches but that didn't turn anything. There are 2 transistors next to each other and one is broken in half (appears someone has dropped something on top of it) and they are the same size. The broken one is unreadable in the middle but beginning and the Z4 end is same as the other transistor so I assume they are the same. I am hoping any of you can help me identifying it and get a replacement.picture taken with a magnifying glass
SOT23 marking K1P the first hit links to the MMBT2222 datasheet
which contains the following text ( on page 2 in a section called"Marking Information" ).
K1P = Product Type Marking Code
YM = Date Code Marking
and a further table decoding the "ym" date code. The table only goes up to W (=2009) but it's reasonable to guess that Z4 means April 2012.
Seems pretty conclusive to me.
(SOT23 is an industry standard packaging which looks exactly like those in the photo)
And it's a common type of NPN switching transistor so it should be very easy to find a replacement or a suitable substitute.