I have soldered all the components but the board does not seem to work properly. Only the push-button latching system works. When the push button is depressed, the LED lights up very brightly but only for an instant and goes back to a dimly lit state as if there was a surge (There are no burn marks observed). Input is around 3.8V and output junction reads approximately 0.9V.
The components polarity are soldered as per the guidelines on the PCB. I soldered the 2nd board the same way and it has the same issue. I took extra care in soldering the components for the 2nd board and I am quite confident there was no overheating etc.
Can someone advise on how do I troubleshoot the circuit further? Or if the circuit contains some design errors?
I have contacted the freelancer but he's not as responsive hence I am here seeking help. I still have enough components for 3 more boards to try.
P.S. I have no professional knowledge in electrical engineering.