My ps3 is showing the loading disc but never loads the game discs go in and out the drive ok and everything seems normal just wont play will it need a new drive or can this be repared ?

*NOTE* some of the steps require you to open up your ps3 which will void warranty. so if your ps3 is still under warranty give sony a call for they'll fix it for free. also before you open up your ps3 make sure you can play downloaded games and demo thats on your hard drive. if you can do this then you know you don't have a problem with your nand chip which is a BIG BIG problem... can you hear your drive spinning? read on

what you have is a problem thats hard to diagnose.
the easiest thing you can try is to clean the lens.

along with checking the cables that connect your drive to the motherboard and etc..

if that didn't work you can try replacing the whole drive -- *NOTE* if you do change the drive make sure you buy the right type and also when u buy a new drive you will be getting the drive/moter/lens only and not the control board that is attached underneath . you'll have to put your old control board onto the new drive. most of the problem will be fixed by replacing the drive n hope yours will be one of them...

hopefully you get your drive working after these steps if not you will be getting into more complicated fixes.

this is one of the sites that i come across alot that fixes different ps3 problems
http://www.gophermods.com/index.php?l=product_detail&p=7

if you still want to fix it yourself......
still if that didn't work you may need to replace couple of things on the drive board which can get very technical. very technical because in 2 ways.

1) your ic chip -- which controls the dvd drive mainly the motor -- may be bad and you could try replacing that on your control board but that involves desoldering/soldering near many other component of the board. very trickly but doable. on the scale from 1 to 10 10 being very hard it'll be a 9.

2)if after you replaced the chip and it still didn't work you may have more than 1 problem on your control board in which case you need a new control board but the thing is there is another chip that (the nand chip which holds the firmware of your ps3) is married to mother board and without that chip your ps3 will not read/load/operate/insert/take any of the disk or downloaded games on your ps3 hard drive. so just swapping the control board won't work. So you'll have to buy a new control board and swap out the nand chip.

again very technical and not for a novice. even some repair shops send it off to do these fixes to a more specialist if your ps3 is still under warranty its just best to send it off to sony and let them fix it for free. they cover your system for a year from the date of purchase. and you may or may not get your original system back. check youtube for "replacing ic chip on ps3" or "replacing nand chip on ps3" you'll find that some people have actually fixed their systems.