[Elecraft] K3S Initial setup calibration problem

[G4GNX]

I just assembled a new K3S. Covers are on but KPA3 not yet installed.

The installation manual mentions that there may be error messages initially, 
but there were none.

The first issue is that there is no RF being detected on RX, all bands, 
although I can hear the usual background hiss which does not increase with 
an antenna connected.

I also noticed that the KAT3A was not being detected, despite being 
configured as installed. This meant that I could not select Ant 1 or 2.

I firstly forced a power-up reset to ensure there was no firmware 
corruption. I then used the K3S utility to load the latest firmware and went 
on to perform config and calibration.

When it came to setting up Xtal filters there was something odd happening. I 
only have the 2.7KHz filter installed at present in position FL3, intending 
to install the CW and FM filters from my K3 later.
The config showed that position FL1 had a 2.7KHz filter installed, but no 
offset (5 pole filter). I set the config correctly for FL3 position and 
zeroed FL1, but the utility complained about having no filter in FL1, so I 
reconfigured FL1 position as having a 2.7KHz filter installed. I left the 
FL3 position still configured.

Lo and behold the ATU is now recognised and I can select Ant 1 or Ant 2, but 
still no RX. It also fails the 5W calibration.

I haven't been back through the instructions yet (it's bedtime here!) but I 
presume that there must be an actual physical filter installed in FL1 
position and this may be the cause of my issues??

73,

Alan. G4GNX