The LED flashes I read as:
W, 5G, 1R, 6G, 1O
B G B G G G B B
Looking at this page to decode them:
W, 5G, 1R, 6G, 1O ← No touchpad detected (which is obvious, you removed it), RAM OK.
B G B G G G B B == 10100011 → 1100 0101 → BIOS Code: 0xC5
Summary:
Your RAM is fine, something else is at fault.
FW have not published the BIOS Code for the FW16, so although it is saying 0xC5, we don’t know what that means.
Conclusion:
Your only way forward is to contact FW support.
You might have luck trying steps from this thread, as they had the same BIOS 0xC5 code.
Commonly referred to as the RAM shuffle.
But my best guess is FW support will replace the mainboard. As per this thread: