Geeetech

The PCB is a GT2560 (V 3.0) and the LED that turns on is the D6, 12VB https://lh3.googleusercontent.com/f9wvCnx-0NiWrHs79VgFLJ_kFbAmiOkQJ6UobjHk0grEMnBvpn55R61-Ry8LnEPhW1t2cTM9JnbPaw6Ly-DMl4fxSksdzo1bFgUPHyXu_Fbx-k9bWgLkK_vtNle-NKalkQEz4k9hLSO0YpyCPfW31WkmE4MjdHycKJHzdmSzV5sN739BJyW7RumXBhUKfgcfQ7PJ...

Hi, For my control board only one of the lights lits up, and it's not the one int the circle from the picture. So do I need to replace the control board? https://lh3.googleusercontent.com/FcLQZIxXtfiAelH2-tfUkPahdU3x2tTDocaepAqMDqrrGXzdZwRE8q_Rn2WrMG2L2-A_3LPfRptV6gU6XndKK_x8pMXVCgzIsjp89BJWcl6HEjDE...

So I have a problem with my LCD screen, I was replacing the hotend of my printer and some of the screws were really tight because of filament residue, so I turned on the printer and set the nozzle to 155 deg. While I was unscrewing, I heard a little buzz, which suddenly stopped, however, I noticed t...