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 Upon reassembly, 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. 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 Since then, I have played numerous PS2/PS3 games for 30 minutes at a time with no issues until the following. Where the issue comes up is, I was playing Tekken tag 2 yesterday for approx 20 minutes and out of nowhere, the unit switched off in game, beeped 3 times and a remaining red light began to flash until i turned the unit back on. I have tried to research this online but i am seeing mixed answers ranging from a bad HDD to the precursor to YLOD. 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 simply get rid of the thing now.