820-00431 No Video Lightning Strike

[prodigy83]

This iMac the customer said stop responding to video when lightning struck.
I have narrowed the power rails down to no voltage on PP1V05_S0_REG.
The 4 LED's, only 1, 2, and 3 light up. Even if I plug in the screen from the iMac, it never recognizes the screen by lighting up that 4th LED.
I get no video by plugging in via thunderbolt.
All USB connections give me the 5v.
I get no chime through the speakers.
PP1V05_S0 is there.
I am stumped. Dead onboard video graphics chip?
Thermal camera shows the image below.

 

[2informaticos]

Do you get CPU core?
Try known good BIOS, clean ME.

 

[prodigy83]

Do you get CPU core?

Yes, I do. I will try the BIOS. Thank you.

 

[prodigy83]

No go with flashing the BIOS, I am however seeing only the 1st and 2nd LED light up. I am not sure if I got the right bin file. I found this one off of Badcaps.net
9.5.3.1526_SLM_PRD_outimage.rar

Badcaps Forums

Bad capacitors, capacitors, bad caps, badcaps, vp6, ka7, shuttle, computers, computer, failed caps, failed capacitors, tv repair, television repair, component level repair, electronics repair

www.badcaps.net

 

[2informaticos]

Try this too:

Imac 21.5 2015 820-00431-A ME.bin

drive.google.com

Not sure if good, but worth to try...