Hello everyone! :-)

A friend of mine asked me if I could repair his parents' defective PC...
Therefore, I need the circuit diagram (and if possible also the component layout) of an Intel DQ77KB mainboard.

Can anyone help me with this, by any chance?
Thanks in advance!

So long​

Hi,

I've got an Intel NUC8i5BEH which doesn't turn on.
On the mainboard there is a little LED "SATA_PWR STBY" which is on as soon as the power is plugged in.[LIST][*]But when I press the power button nothing happens - no fan spin and nothing on the screen (tried HDMI and USB-C).[*]On the power button also the LED dosen't show any activity. The pads from the power button measure 5 and 3 volts.[*]I also tried to recover the BIOS with a .BIO file - also no success (since there's nothing on the screen).[*]Disconnecting the CMOS for an hour also make no difference [/LIST]I...