Getting "An error has ocurred, turn the power off and check "

I have a GameCube that gives this error

Block Image

I have already calibrated the potentiometer to around 250, but still getting the error, I have tried with various games, cleaned the games and still getting the error :(.

Is my console dead? or is there a way to repair it?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0