This tutorial will focus on replacing the PSP laser assembly, but it can also be used to replace almost any other part of the PSP. To get to the laser assembly you first have to remove the motherboard, wireless board, lcd screen and housing, dpad, power switch board, umd door, etc. Make sure you have a few ziplock bags for screws and small parts.

You can purchase a replacement PSP laser assembly in...................

Symptoms of a broken PSP laser:

PSP wont play new disks
Games and movies freeze or skip
Slow loading
Stuff you will need:

Sony PSP with a bad laser
A few small screwdrivers (phillips #000, flat head)
Needlenose pliers
Ziplock bags for screws and small parts
Patience... this is not an easy job

First you have to remove the PSP faceplate and the lcd screen assembly


Remove the screws in this picture. The red triangles are behind the battery. Try to keep the screws for each step of the tutorial separate. Doing this will save you a lot of time when youre putting your PSP back together.
http://i16.tinypic.com/4i1gkdd.jpg
Use a flat head screwdriver to pry the lcd housing out of the PSP. When the tabs are out open the UMD door. You should now be able to get the lcd housing out of the PSP.
http://i16.tinypic.com/2viqqt3.jpg
Remove the screw and disconnect the wires/cable from the motherboard. Use the needlenose pliers to pull out the white connector in the top right part of the picture.
http://i17.tinypic.com/48n4qcx.jpg
Lift the clasp that holds the cable for the d-pad and remove it.
http://i18.tinypic.com/4702fja.jpg
Remove the green circuit board in the picture. Take the wireless antenna (gold thingy) that the long cable is soldered to and move them both out of the way. You should now be able to remove the motherboard.
http://i10.tinypic.com/42ldrh4.jpg
Excellent! Put the motherboard in a ziplock bag and move on to the next step.
http://i12.tinypic.com/3z7ipg9.jpg
Remove the two screws.
http://i18.tinypic.com/2zyx1f7.jpg
Remove a few more screws.
http://i15.tinypic.com/2woywyc.jpg
Remove the motherboard support.
http://i18.tinypic.com/3z7r5fr.jpg
Remove the black plastic part.
http://i17.tinypic.com/491ookm.jpg

Remove the memory stick reader circuit board.
http://i15.tinypic.com/4dxmpv9.jpg
This is the tricky part. To remove the UMD door cover you have to use your flathead screwdriver to pry the hinge out and to the right. If you use too much force you will break the hinge!!!
http://i13.tinypic.com/34gaqfd.jpg
Remove the four screws.
http://i17.tinypic.com/2qasfpk.jpg
Remove the UMD assembly.
http://i13.tinypic.com/2qtlpiu.jpg
Use your flathead screwdriver to pry the door off the umd drive assembly.
http://i18.tinypic.com/3yn46bl.jpg

Youre 50% done! Installation is the reverse of removal.

HOPE YOU'LL GAIN KNOWLEDGE!!
SANA NATUTO KAYO HEHEHE!!