Dell Dimension E521 Tower Only - $25

Used Dell Dimension E521 tower only no power cord.
Tower will turn on but gets stuck has lights Green on front of tower 2 & 4 which could be Video, PSU? No warranty as is.
Inside and out is clean no dirt or dust.
Vblog below of common problem maybe easy fix? https://www.
dell.
com/community/en/conversations/desktops-general-locked-topics/dell-e521-diagnostic-lights-stuck-at-2-4/647f66d8f4ccf8a8de3ce7c1 Dell Dimension E521 Windows Vista Home Premium OEMAct Seagate 3.
5 250GB HD AMD Athlon 64X2 Samsung 2 sticks 1GB each Nynix 2 sticks 512MB each Dell PSU H305N-00 405Watts Anatel RD01-D850 56K V.
92 PCI Data/ Fax Modem