hello to all .

I will explain .. I get a PS3 in Ylod for long time and what was my surprise (before disassembly for repair conventional thermal gun) that the ylod is caused by the blueray drive If i disconnected the connector with 4 line (3 gray and 1 black) I have no Ylod and the PS3 starts normally everything works, internet ,downloads, etc. conection to PSN! etc! etc!.. (No games player since disconnected) if it is on and I reconnect the connector with the 4 famous lines (3 gray 1 black) it is instantly in Ylod .. Ylod therefore not necessarily have the overheating To verify my findings I replaced the drive with a same one .. no more ylod everything seems to be good its take the disc , turn i hear it reading the disc ..but ! . problem! I have a black screen when I run a demo on the PS3 HDD, and it does recognize that audio CDs but not read them in May (message..: corrupted data) after much research I learned that we can not change the Blueray drive (or daughter board) because it is encoded with the motherboard (hence the black screen at launch demos) and I just learned a few minutes ago by a former Sony agrees that there is a cd called "CD detection failures" with all the codes, because it seems that when you change drive (possible) must re-encode with the motherboard and the famous codes on cd that I suppose only sony owns the VAS; My question .. someone he heard that it? or leaning on the issue? any infos would be welcome because I have a PS3 that works, a good blueray drive but who refuses to communicate with the PS3 . very frustrating!

sorry to be long I hope that my "post" to avoid some heat for their motherboards for more than three months that I am looking for infos I have always read that Ylod = overheating I say NO .. not always! .. I can prove (with a video if some have doughts) .. I await your comments, remarks and solutions if possible .... thank you .. sorry for my bad english (i am french)hope some understand me