04-19-2017 12:18 PM
04-19-2017 12:42 PM - edited 04-19-2017 12:43 PM
Did you try clean install of Windows 7 in the new HDD?
Did you change any BIOS settings before this happened?
Can you try replace CMOS/RTC battery with a new one and see if issue is resolved.
04-19-2017 02:53 PM
I'll suggest you to replace CMOS battery with a new one.
Do a battery test. Replace battery with a new HP genuine battery, as battery is the first to go out in this old machine.
See if AC adapter is good enough or need replacement.
04-19-2017 03:04 PM
Well you've tried almost everything as troubleshooting. There is no harm in trying these too, isn't it?
Is there overheating, unusually warm air through vents?
Have you reapplied thermal paste over processor, heat sink?