So, I have HP Pavilion ze2000 EK798EA#ABB with AMD Sempron. After I disassemble it to change thermal paste for the first time since 2005, I found that under heatsink there is no any thermal paste. There is thermal pad for video chip, but CPU is absolutely clean. I didn't found any traces of what somebody disassembled it before me, so it was like that from the factory. My question is what the hell is that, and why it is never overheated ? There is photo on imgur:
View: https://imgur.com/a/vgeLJ4i
.
.