I tried all the ways but always had the same black screen. You have to carefully separate the CPU from the heatsink and clean it up from the old thermal grease be careful not to Toshiba Satellite L350D Touchpad OnOff CPU pins. After the CPU is in place, you can apply new grease on it and install the heatsink. And I didn t see any thermal grease, or is it this white thing??? Thanks so much for your help! So[…]