Are the printers attached wirelessly and the PCs wired by any chance?
If the printer is connected and working, anything else is irrelevant.
All the printers and the PC have wired connections.
The printers, when switched on and connected to the SH2, appeared on the Device list and worked fine.
The printers, when switched on and connected to the replacement SH3, do NOT appear on the device list and as yet I have not managed to print to them.
Is that clear enough?
Can you ping the printers?
Errrr.....not at the moment, as I've put the SH2 back in its place 🙂
Will try more next week.....