DCC170 batt indicator at all time (shutdown after start-up)

Hi all, I’m a Little out of Ideas what the cause could be. Situation: recap and belt replacement of a dcc170. After starting the player shuts down. I noticed the empty Battery symbol in the display. Just to check if a failed the recap I removed them and used new capacitors.

Same issue as before, display is showing low batt and shuts down. What could be the cause? Thank you for your reply in advance. Roel