Im not that good at anything more than basic stuff but if I had to guess at the issue, id say that it may have not capped the head right and then it sat.
You get absolutely nothing though? Not even a single spec of any color on a test print?
You could try a head soak overnight and see if it does anything. Lower the captop manually, move the head over, pinch off the drain line from the captop and then fill it with cleaning solution. Reposition the head and raise the captop back up. Turn the machine off so it wont clean.
There should be better instructions than mine if you search for head soak sp540v, possibly on youtube.
Im no expert so maybe someone else can chime in with an opinion on this too.