I Changed The Thermal Paste In My Computer And Now It Won T Turn On Custom Built Desktop Pc

Chosen Solution

I changed the thermal paste on my CPU and after reinstalling the motherboard and all cables it won’t boot. All that happens is that my fans turn on for like a second while my start button flashes white. The flash ends and the fans turn off. It keeps going like that until I unplug it. I don’t know if I installed it incorrectly or if I did something else wrong

@Erica Samsioe What is the model number of the PC? The motherboard is used on several different HP models e.g. Envy, Pavilion, Omen etc so a white light “may” mean different things, Have you tried a power refresh? Disconnect the power from the PC and then press and hold the Power on button for a full 30 seconds then release. Reconnect the power and try turning it on. If still no good repeat the procedure but this time remove the coin cell RTC battery from the motherboard after disconnecting the power and before pressing the Power on button for 30 seconds. Reinsert the battery (usually it is +ve on top - marked on battery), reconnect the power and turn on.

reseat your RAM also verify the CPU cooler is connected to the right header.