Resources
Wiki
lowendmac.com (OS downloads)
Gamba (many useful links, including OS compatibility matrix)
freaknet.org (schematics)
Apple Macintosh SE FDHD is identical to the regular Macintosh SE, the FDHD mark was added to note the inclusion of a hard drive, missing in the base SE.
Resources
Internals
Motherboard
Memory Modules
Analog Board
Power Supply Unit
CRT
CRT Board
Floppy Disk Drive
Sony MP-F75W-01G
Hard Disk Drive
40MB Quantum ProDrive
FDD & HDD Cradle
Screen
This screen looks like it is some DIY aftermarket addition. It is relatively heavy and significantly increases the weight of the machine.