Run the appropriate Self Test operation (from the software) for the suspected problem
before attempting any mechanical or electrical troubleshooting.
Supply voltage: Check the AC input voltage and DC supply voltage for all sections.
Make sure they meet specified voltage values.
Connectors: Check all connectors and make sure they are tight.
Fuses: Check for blown fuses (F1 and the thermo-fuse inside the AC adapter).
In the logic control circuit, it is difficult to isolate faulty points in areas connected tot he
CPU by the address bus or the data bus. If a suspected problem involves the address
bus or data bus, first check the solder bridge and the cut circuit pattern. If a faulty point
cannot be isolated, replace the peripheral devices or the PCB.
Checks After Repair
After completing a repair, check to confirm that the trouble has been eliminated. Also,
record the troubleshooting procedures used for reference.