HO a6600F desktop, changed power supply, only booting up to blue HP screen.has a Tags: Hewlett Packard Power Supplies Desktops Computers Last response: September 13, 2011 1:34 AM in Computer Brands Share cmward September 7, 2011 3:48:16 PM Changed power supply on HP a6600f desktop. Now ill only boot to blue HP screen with four options. Cannot access anything More about : a6600f desktop changed power supply booting blue screen Ubrales a b α HP a c 91 ) Power supply September 13, 2011 1:34:37 AM Welcome to Tom's Hardware Forums! Is the new PSU a good working PSU? If so, check the 24-pins connector and the 4-pins/8-pins connector and make sure that these are mated well and the latches engaged. Check RAM too. m 0 l Can't find your answer ? Ask ! Publish Read discussions in other Computer Brands categories Compaq Dell Gateway Hewlett Packard Packard Bell Apple eMachines !