crwdns2936637:0crwdne2936637:0 crwdns2853008:0crwdne2853008:0 crwdns2918746:0crwdne2918746:0
crwdns2918538:0crwdne2918538:0

crwdns2934243:0crwdne2934243:0 mike

crwdns2934249:0crwdne2934249:0:

This may help:
http://www.s-manuals.com/notebook/lenovo_y50-70
+
+Have you tried taking a high resolution photo of the motherboard or using a magnifying glass or loupe to look closely at the board. You should be able to see where the connections were. A broken wire end or some other disturbance at the solder pad..

crwdns2915684:0crwdne2915684:0:

open

crwdns2934241:0crwdne2934241:0 mike

crwdns2934249:0crwdne2934249:0:

This may help:

http://www.s-manuals.com/notebook/lenovo_y50-70

crwdns2915684:0crwdne2915684:0:

open