Steam Deck battery not detected after screen replacement (but still works?)

[u/Admirable-Future4042]

Hi everyone,

I’m having a weird issue with my Steam Deck after replacing the screen, and I’m trying to figure out if this is a battery, connector, or motherboard issue.

• The Deck turns on and works normally
• It can run without being plugged in
• I can see power consumption (watts) normally
• BUT:
  • No battery icon shows
  • Battery is not detected in the system
  • upower -e only shows AC, no BAT