Here we offer you a drive board for the drives with Laser KES410AAA in your Playstation 3.
If you cannot find the problem in your drive, it might be the best to exchange the whole board. But the problem is that on the board is a Spansion chip. This chip includes a code which is unique for every PS3 and drive and the PS3 won´t work without this code. So you have to exchange the Spansion chip as well from your old board to the new one. So soldering skills are needed. Here is a video that shows the replacement: http://www.youtube.com/watch?v=6Zh46cR6k3s