For parts, missing parts as seen on pictures. Does not power up. Internal pictures to be taken if requested.

https://support.apple.com/kb/sp623?locale=en_US

This was the spec

iMac (21.5-inch, Mid 2011)

Purchase Date: June 2012

Serial Number: C02H4AQQDHJF

iMac "Core i5" 2.5 21.5" (Mid-2011)2.5 GHz Core i5 (I5-2400S)

Intro.May 3, 2011

Disc.October 23, 2012

OrderMC309LL/A

ModelA1311 (EMC 2428)

FamilyMid-2011IDiMac12,1

RAM4 GBVRAM512 MB

Storage500 GB HDD

Optical8X DL "SuperDrive"

https://everymac.com/systems/apple/imac/specs/imac-core-i5-2.5-21-inch-aluminum-mid-2011-thunderbolt-specs.html