[SiriusHardware]

Refugee, it appears to be a zero-ohm short.

If so the only thing which will get warm is the 22R resistor as the short has no apparent resistance for any watts to appear across. I'm also not keen on the idea of connecting a low impedance supply to a line which has an IC output, the CLK1 output from UG5, on it. If the PSU trick manages to blow the short open circuit, the voltage on CLK1 will fly up to +5V and that voltage will be applied to the output of UG5 and the inputs of 7 otherwise unpowered ICs.

I sometimes do use a heavy current PSU to try to blast open an invisible track short but I always remove every active component from the line in question first, just in case I do succeed in blowing the short open.