I had the circuit board replaced but now have no led light at all... any suggestions on how to get the led light to come on... single mom with 2 kids and would like to save as much money as I can... think I should just call a repairman

Chexk to be sure the power to the furnace is turned on and that the blower door is on tight.

You say you had a board replaced, does that mean hat you paid someone to replace it. If so I would call them back and see what kind of warranty they offer with their work.

Now a couple of questions; Are you sure that the breaker is on and are you sure that the door switch is closed.

New boards are easy to ruin by static electricity so if I were you I would not try to install a second board myself without being grounded to the furnace.

I had a friend replace it. He checked and all limits are good and all contacts are good... the board has power..

The breaker is on and the blower door is tight... the fan is not on as it was before the new board was put in... no led light at all..

Tried turning everything off and then turning heat back on.. nothing has gotten the led light to come on...
I am clueless, but know that is cold here!

The board may be wired wrong. All the connections are individual, rather than the multi-connectors some use.