From my research, these errors are commonly associated with a flat CMOS/BIOS battery, but I have not carried out any further testing, so the laptop is being sold as untested/for repair or restoration.
CMOS Battery Compatible For FUJITSU Compatible For FUJITSU-Siemens Esprimo Mobile V6555
ARyee 5.5 x 2.5mm Laptop AC Power Charger Adapter for Fujitsu Siemens Esprimo Mobile V5535, Lifebook AH530 AH531 A1645 L1310G L7300 L7320 Li1705 M1451G - 20V 3.25A
Classic Replacement Power Supply for Fujitsu Siemens ESPRIMO MOBILE V5535 (65 W)
Fujitsu Siemens Esprimo Mobile V5535 Celeron M Laptop working(See description)
READ! Fujitsu Siemens esprimo v5535 15.4" Laptop Intel Celeron N540 768MB 80GB
READ! Fujitsu Siemens esprimo v5535 15.4" Laptop Intel Celeron N540 2GB 80GB
