This is a restoration program for MARCH for a Dynabyte S-100 system, not to be confused with the Dynabook prototype laptop from Xerox.
So far the system has been partially disassembled. The controller cards have been visually inspected (1800002-4A CPU, 64K dynamic RAM Dual Drive Controller).
The card connectors have been cleaned, the entire chassis has been vacuumed clear of dust.
Finish reading the manuals that came with this system.
Clean the drive heads with alcohol.
test the voltage regulators and power supply
configure a terminal to interface with the controller card, see if there is a way to get to a monitor prompt to check memory.
Test booting disk. No marks on disk, no way to know if it's a good disk.