Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
PC will not boot at startup. Receive 3 long beeps then 4 short beeps, 4 times, and shuts down...
You have a hardware problem.
HP Service or a local PC tech would have to diagnose the cause if you don't have replacement parts and don't want to do this yourself.
The solution was to unplug the power cord from computer, go have a beer, and replug the power! All works fine...
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