Dead Motherboard Repair Help

[Trouble_Maker023]

Hello this is my first Post here, I hope some of you can help me.

Today my Motherboard died, my GPU Blew out its Buck Converter on the Back of the Card and took the whole System with it.

To Troubleshoot I put my Multimeter in Ohm Mode and tested the ATX 24 Pin Connector, no major Shorts were detected, the 3.3V Line had around 300Ohm and the 5V and 12V Line had a couple thousand Ohms.

Upon plugging in the ATX Cable the PSU briefly power on, put immediately shuts down again.

To see what parts get hot upon powering it on, i have taken a picture with my thermal camera

My Motherboard is a Gigabyte GA-H87-HD3

I have no experience diagnosing Desktop motherboards thus help would be highly appreciated

[Rasz]

that thermal picture is with no cpu. Board wont power without it, part of the powergood circuit checks CPU voltage rails
edit: wait, where is your cpu retaining bracket? 

[drussell]

Today my Motherboard died, my GPU Blew out its Buck Converter on the Back of the Card and took the whole System with it.

It is probably way more likely that your power supply had a conniption, died and over-volted a rail or something, blowing up the rest of the system in the process.

[PKTKS]

Yes like said above you should power the system with CPU on board...

But nevertheless  your thermal picture is very suspicious...

YOUR PCH CHIP (the chip with hottest spot..)  seems way too hot
for a board like this... 

Usually 2 CHIPS  are  most likely to fail isolated or together.
- PCH
- Super I/O

Your Super I/O is dead cool while the PCH (call it Northbridge Southbridge..
INTEL lingo is crappy) is way too hot...

Several reasons ...  if failed..  a BGA is required.

Put a crappy CPU and try to stand by ... take the thermal
and Super I/O  voltage readings..

3.3V LDO regulator..
5V Stby

are required
Paul

[Rasz]

YOUR PCH CHIP (the chip with hottest spot..)  seems way too hot

cant tell without scale/patelle visible

[Gyro]

Yes, a good example of technology telling you nothing. Those 'hot spots' could only be a couple of degrees warmer than the rest of the board. Note that there seems to be a thermal reflection (OP's skin temperature?) at the bottom right [Edit: and also on the CR3032 lithium cell].

(Note that the thermal image is rotated -90').

[PKTKS]

YOUR PCH CHIP (the chip with hottest spot..)  seems way too hot

cant tell without scale/patelle visible

Look the Super I/O...  dead cool...
Now  consider .. .if the Super I/O is dead cool...

How can the PCH receive the EN_able signal and turn ON ?

Therefore it is reasonable to assume something odd is turning
ON PCH and totally OFF  the Super I/O..  (not even the 3V to the
pull up start switch appears as "hot"...)

Something ODD is keeping PCH "HOT"  and Super I/O dead cool.

Whatever temperature it is... it is odd

Paul