PS3 blu-ray problems

[Zairs]

One of my ps3 i fixed came back not ejecting disks, i have sorted that and it now takes and ejects beautifully, not it just one read discs, i have spares so i tried a drive out of my ps3 with same board it has the disc in the corner of the screen spinning but the units wont spin. it does this on both units. i also have several different blu-ray boards and one also shows the spinning logo, so i think both the drive and board both work so ive run out of ideas.
Anyone have any ideas??

 

[Zairs]

i know they are paired, but i was told that there are only a few different types, i tested a few and another one of the logic boards has the disc logo in corner of the ps3 but nether spin the disc. the other boards do nothing. i also used a working drive off my personal ps3.
i'd be interested in knowing he ways around it as i have another ps3 with a definate logic board problems, could you trust me some more info?