It's a Apple IIe. Test it with Zero Cards in it. If it works, it should pop up into Apple Soft Basic:
1)
Apple IIe
] (flashing cursor)
or 2)
Apple //e
] (flashing cursor)
- - - - - -
1 is the older Apple IIe/II+ ROMs which runs on a 6502 CPU.
2 is the enhanced Apple //e ROMs which runs on a 65C02 CPU.
Some IIe's can have a 65C02 CPU and IIe/II+ ROMs from a cheap/poor boy upgrade.
You can look at the Think Classic's Apple Section:
https://www.thinkclassic.org/viewforum.php?id=6 or the 68KMLA Apple Forum section:
https://68kmla.org/forums/index.php?/forum/8-apple-i-lisa/ If it turns on without the cards, then you are ahead of the game. Most Apple issues are from their cards. Then you can get ADT-Pro (?) to boot it from a PC as a boot media.
http://adtpro.com/configserial.html EDIT: I have several Apples and Apple Clones. Getting then fixed up and running can get you a pretty penny for them; check out the prices on ebay, they can be ridiculous! One of my apples, has a "RocketChip accelerator" making it about the same as a 50mHz 486DX or 35MHz Pentium. That baby if I had to sell it would go for at least $5grand because of that chip. Transputer and ZipChicp are another two you need to look out for. They are in place of the 6502 and a couple on a card in Slot 0 or 1 (Slot 1 in the IIe as it does not have a Slot 0).