MagSafe LED sometimes won't light up

I have a Mid 2014 MacBook Pro with Retina Display. As of a week ago, occasionally when I plugged in the MagSafe Adapter, the LED doesn't light up. The problem is fixed by unplugging the power adapter from the MacBook and plugging it back in.

Should I worry with this? Is it an indicator for something wrong?

Last time I remember with my previous MBP, I had the same issue and it was getting worse, and then the logic board died.

Solution 1:

This issue can often be caused by debris in the MagSafe port, I sometimes get small metallic particles, attracted there by the magnet. If this is the case, brushing the port with a dry cotton swab can fix the problem ( see here: https://support.apple.com/en-gb/HT203207)