I have a frustrating Z3200 problem that I have not been able to solve through the service manual or google search or searching this forum and Mark L. great website. The z3200 has been printing beautiful prints but recently went unused for a length of time. So, it had the expected issues with clogged print heads. I purchased all new ink and print heads but it sat powered down for a long time until this was done. Now after installing all of the new cartridges and print heads, it initializes fine, goes into print head installation which I complete and then immediately after it shows that it is checking print heads, the display abruptly goes blank and only the PSU fan is running as far as I can tell. I can't get past this. I changed the formatter battery with no result. I then bought a complete formatter and HD assembly which, after successfully completing the expected initialization and Fdsk check, also fails at same place - the checking print head stage.. I can find no one describing a similar issue or any help on trying to figure out what is causing the problem. I ran through the electronics module diagnostic, sensor, scan axis, and carriage assembly with no errors except the +Vs and +Vaux voltages were lower than the service manual showed but I found other people saying the same thing even on a normally operating DesignJet. Any ideas about what could be the problem and/or next steps would be greatly appreciated. My thought was to replace the PSU in the absence of anything else but thought I would check here. Thanks for any support you can provide.