E602-0001 is HD-related error.
There are many threads posted on this forum in connection with this particular problem/topic.
- My advice to you is to spend sometimes to PERUSE through the forum Archive and you will be able to dig and come up with a wealth of information on this topic, with the suggested PRACTICAL SOLUTIONS offered, which has helped many people including techs. Take your time, and you will really learn a lot.
- Otherwise, the following HINTS should be useful:
-E602-0001: A HDD mount error was detected when the HD was started up.
-Check the faulty connection between the HDD and the main controller PCB.
-Poor HDD: Replace the HDD, and reinstall system software.
-Poor main controller PC: Replace the Main controller PCB.