I killed the PS3 I was working on inn an attempt to delid the CELL and RSX.
Delidding the RSX was easy, just a little heat and it popped off really easy
Delidding the CELL was a challenge and I knew I failed when the IHS came off and saw 3 scratches on the substrate. Put new thermal paste on the die and instant YLOD.
This was at least a good practice for me so that I can replace the caps on my personal PS3.
I wanted to try a delid because the fan on this eBay PS3 was so damn loud. No matter what game it was, after just a few minutes of play the thing was at its highest speed and became ear piercingly loud so it would just be unplayable.
Personally, i don't think using any sort of metal tool - no matter how flexible or sharp it is - should be used when delidding. I used a .006" feeler gauge as it was very flexible but also not too stiff so that it's thin enough to get under the IHS as it's quite a small space between the IHS and the substrate. Unfortunately I knew I messed up when I saw the feeler gauge kink.
I saw someone a few posts back mention using some thin nylon fishing line which sounds way better and safer.
But alas, I have a PS3 for spare parts now unless someone is willing to replace the CELL. It's been a learning experience and well worth the $45 I paid for this PS3 just to get refamiliarized with soldering again.
RIP PS3
EDIT: Im not even sure if delidding was even necessary for my fan issue.
I'll find myself another PS3 from eBay, possibly just the motherboard and see if delidding with fishing line would go better
I wanted to do a delid because about a week ago while I was searching for thermal adhesive- so that the IHS can be re-attached the RSX and not just be loose I found this intriguing video of an engineer creating his own thermal adhesive epoxy. It seems to work really well and he does sell it at half the price of the current thermal adhesive we can buy. I figured an epoxy with a much higher thermal conductivity wouldn't hurt (other than the person trying to delid the IHS again) and probably lend itself to much better thermals overall for the RSX. The CELLs IHS is simply secured with a ridiculously strong silicone type of thermal material and doesn't actually do anything other than keeping the IHS on the die.