Chosen Solution
I replaced the system board in my laptop HP Envy 17 3D Product # A6U50AV. Everthing works fine but the Model Name in the BIOS shows as HP Pavillion DM3. This is incorrect as my model is HP Envy 17 3D. How do I change this information?
Remove & insert again the CMOS battery, this will erase firmware memory. If nothing will change, flash a new Envy firmware. There is almost zero probability, that incorrect program is sitting there right now if the computer is working. But indeed, this is a weird situation.
