I have a Z4000 with the "short light" staying on continuously. Everything is disconnected, power cycled but no change. The right handle seems to have an mechanical issue, something seems to be rubbing/interfering - I assume something got loose. Any tips on how to take the cover off and tinker with the handles? I am not finding much on the forum or web in general except send it in. No smoke no arcing seen, just the red light came on. The aux power still provides voltage - have not put a voltmeter to the track outputs, I'll check this, but pretty sure nothing coming out.
Thanks for any insights -
Got the cover off. One of the cover screw mounts had broken off and was rattling around, but that was not the issue. As it turns out the right hand handle was nothing more than the adjusting screw accessible from the underside had gotten loose to the point the handle gears did not engage with the pot. A little adjustment and the handle works fine.
On the other hand the transformer still shows a short. I could not see anything burnt, melted or discolored. Ill have to decide whether I want to send it in for repair or try to find a used one.
You need a long hex or torx bit to unscrew the cover. Screws were in hand tight so not a big deal to remove the cover. There are several wiring harnesses which connect to the cover so be careful lifting the cover, they need to be separated to get the cover completely off. I do not think there are any user serviceable parts in there so not much point in trouble shooting unless you have a guide and the diagnostic tools.