The only step I did not do was removing the power coils for GPU, so I did, put a fresh BIOS, still same result. Board is with the 3 jumpers for GPU disabling, both GPU coils removed, new BIOS. Same status. LCD BKLT powers on, no image, no chime, just fans spinning at max. Cannot reset PRAM, machine does not respond to any commands, no VCORE present on L7560, L7550, L7510, L7520 and L7530, all of them have 0.05mV on them.