Trying to install pico fly lite, getting yellow flashes

[abesner00]

Hello all,
I hope someone can give me guidance here.
I'm trying to install a pico fly modchip in a Switch Lite.

When I try to boot to check the installation, I get this error code after the blue light :
Long yellow, short yellow (repeated 3 times)

Any of you know what might be the problem? What solder points do I need to verify or redo?
I've been trying for a few hours and am losing hope.

Thanks!

 

[Nephiel]

=* D0 is not connected
Picofly LED indication codes

 

[abesner00]

This is what I figured looking at the firmware website.
Should I try to resolder points C, A and D then?
Thanks

 

[thesjaakspoiler]

DAT0 should be the pad labelled 'C' according to the images on this page :
https://wololo.net/2023/03/21/picof...acking-modchip-is-real-and-its-now-available/

Maybe also check the flex cable on the CPU.
It looks as if there is some wire on the left caps.

 

[abesner00]

Thanks.
On the CPU, it’s actually a bit of cotton swab that I used for cleaning.