Originally Posted by sadiq
Yeah, it's the one my brother lapped. I took it off to relap it the right way and now this is happening.
First of all, keep him away from your PC, or make him buy it from you and you can get new gear.
I've never lapped, but I've read about it, and it makes sense that if you remove material from the sink and the chip, you will need to make an adjustment with a shim of some kind or modify the clamp in order to get it on tight enough for good contact and heat dissipation.
If I were you, after exhausting everything the other more experienced posters advise, I would go out, and get the cheapest CPU you can find that will run with your gear, and install it with the stock heatsink to see if it will run.
Having read your previous posts, I have a suspicion that after taking so much material off the block and chip, when you hooked it all up again, you didn't have enough contact and the CPU may have fried.
Again, I stress that I'm a noob and I'm just using logic.