Im having trouble with an Apple III that was given to me.

it has been sitting in a closet for many years and upon powering it up im getting a screen of dots and garbage

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i have tried reseating every chip including the ram. i even swapped some around with the same kind on the board and nothing has changed. i also swapped the ram around too.

voltage from the powersupply is looking good. and the on light on the keyboard is good.

some of the chips and a few more rams chips had tarnish on the legs and i cleaned all that up.

i dont seem to have the chip populated at b3 but i think its a real time clock.

im not sure where to begin.