Hi, So my PC is around 9 (I know, I know I need another one!) Years old. It was working fine, until I recently moved house and had to transport it. I plugged everything in at the new house and it now won't send a signal the the screen. I've troed all the obvious things (clean dust, new wires ect to no avail). I also took the heat sink off to see the cpu, there was some rather alarming grey goop underneath it, but after further reading iveI docoverdis that this is just thermal paste (?). See picture : https://i.imgur.com/9ZEYVqN_d.webp?maxwidth=640&shape=thumb&fidelity=medium I can't see anything else that is blindly obviously wrong.... Any ideas? Thanks a million!