Thanks. I was going to use it for my mid 2014 MacBook Pro. Just wanted to make sure it would not damage that one as well. I have bought a mid 2012 on eBay replaced the blown fuses (those Apple logic boards need a lot of heat, set the hot air station to 425 to get that fuse off) one works perfect and the other one turns on and shuts off immediately. Guess I must have damaged something else while repairing it.
Look up BitPC Repair on Ebay. He has worked on my tough repairs in the past and fixed about 99% of them. Charges $120 for the repair. If you are like me you probably want to try to fix it yourself. The green light and the amber light are a good sign so its getting power and charging the battery. Trying it with a good known working keyboard for that model would be a good start. Although if the keyboard is affected it would start as soon as you plug in your magsafe adapter. I have one right now that had water damage and may need a new topcase, AHT is giving me an error for a temp sensor and the fan is spinning at the max level. I like doing my research to an extent, but when it gets over my head I send it off to the experts.
LED #4 Indicates that the computer and the LCD display panel are communicating. This LED will be ON when the computer is turned on and video signal is being generated. If the LED is ON and there is no image on the LCD display panel, the LCD display panel or inverter might be installed incorrectly or need replacement.