If the A1200 was never used in years...
it will not work
caps not used in years will not works anymore....
If no electricity is circulating by long time on caps...liquid evaporate & they lost the full capacitance
more info about caps issues at:
www.badcaps.comso maybe a recap of the entire motherboard is needed
surely the floppydrive will fail also
surely the HD will fail also but in this ebay item no HD is provided