H110 motherboard

My Pc was running well. Last 5 days having a problem with a startup. when i try to start it, the motherboard runs a cooling fan, and the power supply runs well. But as h110 has board lights it doesn't light up. And pc didn't turn on. After so many tries its tuned on with no issue, but again...

My setup: Asus 970 Pro Gaming/Aura MSI RX 480 Armour 4GB Corsair Dominator Platinum DDR3 1866MHz (4x4GB) I'm looking to replace the thermal pads on all components with Fujipoly Ultra Extreme, as in NB, VRM's, SB, etc... Problem is I don't know the best thickness for each of these components...