Hi, just wanna share another fix story.
I bought a faulty BC model CECHC02 a few weeks ago. The machine actually can turn on a few seconds then goes to YLOD but at least you see XMB that's a good news. So I took it apart. It turns out the previous owner(s) have already heatgunned it, on CPU(but it has a fake sony warranty sticker on it, why people are dishonest these days), without cleaning thermal paste, so it was quite messy.
Tried my best to clean up and solder the syscon wires then re-assembled it. Then suddenly it won't turn on and became a very short YLOD. Error code shows 2110(Clock Generator Error IC5001). Some earlier code shows 1001 and 1002 so these are consistent with the truth it can turn on a while. Those 1001 and 1002 are probably due to bad tokins/power line capacitors issue.
Regardless, I researched the schematic and checked for shorts on the board. It turns out fuse F6001 was blown. And that fuse goes before the 12V enters Q6002, which eventually gives power to lots of 5V devices, including IC5001. So I thought I found the issue, then with my soldering iron I barely can replace a 5A fuse from a donor board then solder it back on. Before turning on I do check for shorts again, this time the whole power line, 12V -> GND, only has a resistance of about 100 Ohm. I knew I'm trying my luck, turn on, fuse blown again, same 2110 error.
So this made me wonder if it's actually Q6002 or other capacitors around it were short. But this check can only be done when I have a hot air rework station. Luckily the station I ordered arrived last week so I can work on that model again. The first capacitor I took off the board was C6019, and to my surprise it actually was the culprit of the short! Without this capacitor, all the power line readings are seemingly good. So I soldered another F6001 on. Turned on the machine, boom, it changed to 1001 error. Good news, at least fixed the short. Turn on a second time, 1200 error. Of course, I didn't have heatsink or fan on.
Assembled, turned on, not a single problem! I assume the 1001 error was "improved" when I put the board on the rework station's preheater and tokins' capacity were restored a bit.
However, the fan was really loud after idled in XMB a few minutes. Command tzone showed the CPU was idled at 78C degrees, with fan about 60% on. That's probably because the previous owner's heatgun speedup the drying process of the thermal paste inside of CPU's IHS. So I followed RIP-Felix's guide to make a delid tool, then practiced on two donor boards. Turns out quite well. Tried on this very board, was very close but still a success. So spread the thermal paste and put everything back. The fan was a lot quieter, with CPU at 67C and 29% fan.
I am quite happy with the result. This is the first BC model I've ever fixed, although I don't know how much damage the previous heatgun had done to the CPU.
EDIT: goodness it's the 2000th post in this thread, such a valuable thread I learnt so much from it. Thank you.