I recently got a YLOD on my PS3 system and did a reflow. It did a pretty good job.
After reassembling my console, I started it and I ..found 2 problems that could be related.
After I turn on the console, the boot screen sound plays, but the screen is black. After 5 sec, the Rogero boot screen comes up and goes to XMB. Sometimes, after the boot screen, it won't go to XMB. It just displays the background with flowing stuff.
The second problem is that my gamepads cannot connect to the system. I get error 80010201. The bluetooth thingie must not be properly connected, I think.
I suspect the problems are related, cause when the gamepad is connected and the lights are flashing, I start the ps3 and the sceen freezes after booting. If the gamepad is shut, it goes to xmb.