Is there only one cause of the ylod
i was doing a search for what causes the ylod and i found a web site http://boardsus.playstation.com/t5/PlayS...
in case you have trouble finding it the site says that this person had the ylod right after a firmware update and they said they took the hard drive out and made it a slave on another computer and formatted it then re installed it and did a firmware update and that fixed it. so then i came to this site and the manual here says it's basically the same problem the xbox has. so i was wondering if anyone could tell me if this is either a more plausible cause of the ylod or if you know if it's another cause or if it's not plausible at all? any help would be appreciated. thanks.
Basically to answer your original question, these are a few things that can cause the YLOD:
Cold-Joint between the CPU/RSX/EE(If your console has one)
Physical Damage to the Motherboard
Dead power supply
Not enough voltage from the power supply (Failing Power Supply)
Corrupted NAND Flash
Additionally, ANY hardware failure (including dead fuses, dead/dying RAM) can trigger the YLOD. Essentially, the YLOD simply means 'Something is wrong inside me and I need a hands-on fix.'
I personally check about twelve different 'key points' before I attempt to repair a broken console.