SAC Isonas R03 no LED indication, no power.
No LED indicting that there is no power to the reader. No power to maglock. Checked PoE switch-OK. Found corrosion in the RJ45 modular jack. No dieletric greese was used in a recent replacement. Edge of reader was not weather sealed. Cleaned modular jack and plug with WD40 and Liquitec, then apply dielectric greese to the jack and seams of the reader.