I have several HP 8530p and I getting the num lock & cap lock leds blinking 5 times which indicates a general system board error. Bought new boards still getting the same issue. Note all the units will boot to windows fine, but there is a 10-15 sec delay in hard drive response when operating pc. The mouse is real time responsive but once you clink on a item the lag shows up. Need suggestions on what to look for as the problem, CPU , Memory changed, Fans, Cooling system. Bios versions have been updated, I've torn the unit down, cleaned and added new thermal paste to CPU, GPU and added copper shims to promote better heat transfer. The system Diagnostics indicates hardware is ok.
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