Hi everyone, A few days ago my mac charger broke so I used my friend's charger once to just get some battery power. I didn't realize that using his charger (macbook 2011) was not good for the computer but it turned the computer on but simply wouldn't charge the battery; I didn't think this was a big issue just the compatibility was off. However, when I got my charger the computer would turn on but again would not charge and this time a blue screen appears right after the gray apple screen but it immediately goes to my log in. I'm not sure if these are two separate issues or if they are interrelated. I am currently in college and getting a new computer is not feasible for me. Is there anyway that this may just be a battery issue and is the fact I see a blue screen a significant issue? Thank you so much for your help I really appreciate it.