Hi I recently purchased a used CECHA00 PS3 in working order with the warranty seal intact. Performed the following since purchasing: - Vaccume internals to rid all the dust - Replaced the thermal paste on top of the heat sinks - Installed ReBug 4.81.2 with webman fan utility Temp status is as follows: 30 mins of GTA 4: 65C CPU // 63C RSX // Fan Speed %30 Dynamic fan set at 67C PS2 fan set at 33C What the issue i am having is, that when ever I try to play Tekken Tag 2 the unit will switch off without warning and beep three times while flickering quickly to yellow, then a blinking red, just like the classic YLOD sign. However I am able to switch the unit right back on after this error, and have the database rebuild, and then i'll be freely allowed to play any other game for as long as i want without the unit shutting off. If i try Tekken Tag 2 again, the same problem will happen, and it will always happen in the same fashion - during game play. Never in the menu's or watching cut scenes. It's very bizarre. I have tried booting from ISO instead of disc, but no change. It's also important to note that the same error occurs if i try to play Tekken Tag 2 Prologue, via the Tekken Hybrid disc, which is a disc consisting of the Tekken Tag 1 game HD, Tekken Tag 2 prologue demo and a blu-ray tekken movie. Yep you guessed it, the problem only happens when playing the tekken tag 2 prologue demo - in game play. Something about this game running during game play does not agree with my unit, and it simply shuts down. It's important to note that upon reassembly of the unit after i replaced the paste, I forgot to connect the fan back up into the board and had turned on the unit for about 5 minutes before a temperature warning showed up on screen, and the unit shut down. This only happened once. I did not have CFW installed at this time so i dont know what temperature the unit reached. What does this sound like it could be? Anything i can do to try and pin point this issue, or prevent it happening again? If it is YLOD related, i'd like to try and narrow the failing component down. Anyone have any advice for me?