Quick way to test LEDs

crwdns2935421:0crwdne2935421:0 crwdns2935423:0crwdne2935423:0

crwdns2935425:04crwdne2935425:0

crwdns2935419:0crwdne2935419:0

crwdns2936315:0crwdne2936315:0

crwdns2936323:0crwdne2936323:0

crwdns2931653:04crwdne2931653:0

crwdns2933707:0crwdne2933707:0

Any 3V coin battery will do. If the LED doesn't light up with the battery in either direction, then it is bad- replace it.

crwdns2944171:0crwdnd2944171:0crwdnd2944171:0crwdnd2944171:0crwdne2944171:0