7 years, 2 months ago.

Dead mbed LPC 1768

I recently discovered a NXP LPC 1768 in my lab, sadly connecting it to USB supply does not even get the LEDs to blink or detection by the PC whatsoever (Yes I have the drivers installed and tried different USB ports and cables).

Have read through the post here: https://developer.mbed.org/cookbook/deadmbed and as per them the next move should be to send it for repairs.

What I observed strangely is that the power is being cut right at the input regulator stage. I tested the pins of the onboard regulators (LD33) and there was no supply on either the input or the output pins. That leads me to guess that the damaged components should be way before them in the circuit probably a trivial resistor/diode(maybe).

I also tested the presence of 5V at the power line of USB on the board (thus eliminating a cable fault)

As such the board is bricked I would like to attempt some troubleshooting based on the direction of the far experienced here. Very eager to try my hands on a working Cortex board after a reasonable stint on Arduino's.

Thanking in anticipation