Chosen Solution
Hello everyone. So. I put my MacBook in my bag when it was on sleep mood and I flew from Sweden to Greece ( 3 hours I guess). When I came to the hotel and opened my Mac, it won’t start so I connected it to charge but the light on the MagSafe won’t light up. I tried the charger on another MacBook and it worked fine. When I came back home I tried to charged it again, and I could see the light is on but I can hardly see it because it was really faded. Any tips?
If the MagSafe charger LED is faintly lit you may need the check the battery health as well as the charging & power logic on the main logic board. The problem with sleep-mode is the system could still be processing something stopping it from going into sleep-mode. So what happens here is you put the system into its case the system heats up in the case unable to cool its self. So the system overheats as it tries to cool its self damaging the battery and in some cases the power logic.
if it charged and worked with another charger, then your charger got damaged during packing. replace the charger.
Check the battery life and if its not good then buy a new battery. Oh, and next time dont run resource-intensive programs while in sleep mode because it could cause the battery to stop working again. Try getting a computer fan see if that works.
I have got the same issue. I flew from the Usa to India and my Macbook is no longer working. I had turned it off and put it in my freight luggage as per new rules. When I plug the charge in there is no light. My laptop is dead, not a single button/power working. Would the motherboard gone? Kevin did replacing the battery work for you?