Editing Atari 800 General Maintenance (section)

== Connector and socket corrosion ==

The 800's modular design means it lives or dies by its connectors:

* '''Module bay slots.''' Slot 1 takes the ROM personality module; the other three take RAM modules. Clean the module edge fingers with isopropyl alcohol and a lint-free cloth, then reseat several times.
* '''Cartridge slots''', left and right. The right slot is unique to the 800.<ref name="faq" />
* '''SIO port''' — J204, 13-pin, on the power supply PCB.<ref name="fsm" />
* '''Monitor socket''' — J205, a DIN socket on the power supply PCB.<ref name="fsm" />
* '''Four controller jacks.''' The 400 and 800 are the only 8-bit Ataris with four.<ref name="faq" />
* '''Power jack''' J206, and the keyboard ribbon connector.
* '''IC sockets''' on the CPU card (A301–A303, 40-pin) and the ROM and RAM modules.