OK this time I really have had it with eBay and PS3s now!
I found a DECHA00A debug station on eBay and bought it. I paid a fair amount of money for it on the understanding that it worked perfectly etc.
When it arrived it was warranty sealed but the Blu ray drive didn't take any discs in. I messaged the seller who gave me the usual "it worked fine before, send it back blah blah blah" and implied it was because I'd updated from 3.55?? Eventually they did reluctantly agree to give a partial refund to cover the cost of repairing it.
So I had to open the console to repair the blu ray drive and on plugging the drive back in I got a load of corruption on the screen and the console wouldn't boot. Since then I have been able to get it to sporadically boot but it mainly goes to a black screen until I do a video reset. It has crashed once with video corruption on the screen and needed a hard reset.
The thing I don't get is it seemed fine before and all I have done is remove the blu ray drive, I haven't been near the board or anything for it to break like that and the seller will just say "you've taken it apart now and you might have broken it yourself or swapped the board etc"
Does this sound like it could possibly be anything other than the start of YLOD or something?
Maybe you could say I should have taken the return while I could but it seemed like such a simple fix it wasn't worth the trouble