820-00165-A Board no Light on Magsafe

[mdc2018]

820-00165-A Board no Light on Magsafe, does have light sometimes but most of the time does not. Everything else on machine works perfectly fine, using known good charger. Any idea?

 

[2informaticos]

Try known good LIO board and flex.
Also inspect LIO connector from MLB.
Check continuity for SYS_ONEWIRE from MLB to the LIO board; onewire circuit in LIO board is very easy to locate...