Chosen Solution
I have four of these computers that will not complete POST. They produce an error code of a solid red power LED and five beeps. This actual error code does not exist in the HP Maintenance and Service Guide under heading “Diagnostic front panel LEDs and audible codes”. Power Supply tested good (fans run); replaced SODIMM with known working module; replaced CPU with known working CPU.
I just read the manual and it does explain what red LED and 5 beeps is. “Pre-video memory error.” It goes on to say: Reseat the DIMM’sReplace one at a time to isolate faulty moduleReplace third-party memory with HP (though just make sure they are DDR3L-1600 or 1866 1.35v, etc.) ( https://www.crucial.com/ScanListView?mod…) Replace system board If the RAM are, in fact, the correct ones and seated properly then it may be the system board.
