user's Guide

     Tower       All-in-one :


          .

    
      .
   
   .
        .
            .
      All-in-one        
  .
 BIOS .   
  BIOS       .
           
Maintenance
and Service Guide
)     ( http://www.hp.com/support/
workstation_manuals.
  


               HP .
      

   .
http://www.hp.com/go/selfrepair
    .
:           HP  .
 HP          .
    
         Maintenance and Service Guide
)    ( http://www.hp.com/support/workstation_manuals:
  POST
 LED   
    
  HP Vision Diagnostics)   Z420 Z620 Z820(
  HP PC Hardware Diagnostics ) Z220 SFF Z220 CMT(
       