Imac Won T Start After Installing Ssd And Dust Cleaning Imac Intel 27 Emc 2429

Chosen Solution

Have SSD installed on my iMac and did dust cleaning, however, after putting everything back, it won’t start, here is what I found: Get the display unconnected.Connect the power cable, LED 1 lights up.Press power button, LED 2 lights up very shortly, then lights off quickly, 2 seconds later, LED2 lights up again, but off quickly, it then goes into this loop.I can see fans are spinning for a short of time when lED 2 lights up, but stop spinning when LED2 goes off. I double checked everything, can’t see any cable connected wrongly. Does anyone know what could be wrong here? Many thanks,

It seems you have a short on one connection. You could disconnect the hard drive and the LVDS (video) cable and start the iMac to check if the lights are stable.