The most anyone could tell you with just your picture is that it is a surface mounted LED and probably white light output. (The yellow colour which is probably to correct the colour temperature of the light is what suggests that it is a white LED.) You were requested to trace out the schematic of the device 8 days ago but have not provided the information. So far you have no evidence that the LED is the cause of the fault. Fault finding is a logical process. Not just randomly replacing components, We expect YOU to make some EFFORT to help find a solution to the problem.
Les.