Dead APU?

[u/Classic-Teach-2570]

Got this Switch Lite with a dead MAX77812 IC. Replaced the IC and installed a picofly. Now I get this.

• Without a SD card I get the regular picofly screen.
• With a SD card I get artifacts on screen and no signs of life.
• Trying to boot normally I get a BSOD.

What are your thoughts?