Asus X59SL "started" but no beep, no display, no cooler

Hello everyone !

On an Asus X59SL used for a midi controller the fan does not start anymore, there is no initial beep, the display no longer lights up , the processor does not heat up. I tested the ram, it's ok, the adapter works, the battery is fully charged in 2 hours, the operating LEDs - power, HDD light up, there is a hard stop after 4 s, the DVD is still trying to initialize something, If it has someone diagram or at least something similar or in what sequence to check the MOS-FETs on the power supply.

Thanks in advance !
 
Sounds likely the board died.

You can remove any memory modules and accessories taking it down to a bare system and try powering up once more. If it tries to come up, likely one of the pieces you removed is dead and you can add one part at a time till you find the bad one.