Correction
1. It's either tuning box or remap
Correction.
You said you took the tuning box off and it made no difference. Therefore it's either mapped or it ain't. It doesn't take the brains of an archbishop to work that out!
You said you've been studying engineering earlier, please, stop, cease to engineer. You're clearly showing signs of at least 9 of the 10 forms of full retardation.