i5 6400 cpu upgrade on Odense motherboard

[BCart]

I need to upgrade my i5 6400 CPU.  I found core 1 to be bad two years ago and I have only been using core 0 since then.  Cores 2 and 3 are good but I cant disable just core 1, I have to set the "multi-processor    " setting in my American Megatrends bios ver A02.0(the newest version which says 1/18/2018) to disable.  My computer has the Odense 2b47 with the Intel h110 express chipset.

Before buying a CPU, I wanted to know exactly what CPU I had by reading what was on it.  I removed the heat-sink, used a razor blade to remove the thermal grease and saw that I had an i5 6400 SR2L7 cpu.  I never removed the cpu or even unfastened the retainer.   I reinstalled the heatsink.  I turned on my computer and the fans came on but there was no output to the monitor, no output to the usb ports, and no beeps.  I spent about 8 hours removing everything, installing one thing at a time, and installing video cards. Nothing worked.  I finally loosened the screws on the heatsink and then everything worked.

I did research on what cpu I could upgrade to and read that the i5 6400 could be upgraded to a gen 6 or gen 7 chip.  I read that k versions would not work because they took 91w.  The i5 6400 uses 65w.  I read that the gen 7 cpus would work, all you needed to do is update the bios. I already had.  CPU-upgrade website says the i5 7600 works with the intel h110 chipset.  I read that Kaby lake works in skylake but coffee lake will not.  I bought a used i5 7600 and some thermal grease.  When I installed it, it behaved just like the i5 6400 did when the screws were too tight.  I tried multiple things and disconnected everything and even took out the memory.  Nothing worked.  I put the original i5 6400.  I turned the computer on, fans ran for about 5 sec, it turned itself off and on again and everything worked.  Then my investigation led me to this page that shows which processors I can upgrade too. https://support.hp.com/us-en/document/c04790427  It does not list any cpus other that gen 6.

So my question is,   can I upgrade the cpu in my hp envy 750-114 to an i5 7600?

To answer this question it might help to answer the following questions:

1.  Has HP updated the information on the motherboards specifications page since the bios updates and later generation cpus came out?  Is the information old and no longer maintained?

2.  Why isn't the i5 6600 cpu listed as an available upgrade on the hp motherboard page? Could the reason that the 6600 is not available for an upgrade the same reason that the 7600 doesnt work?

3. Will the 7th generation cpus of the listed 6th gen compatible upgrades work?

4.  Why is the behavior of the 7600 the same as the 6400 when the screws were too tight?

5.  Did the most recent version of the bios not include the ability for 7th gen processors? 

6.  if not, can HP issue an update for the bios that  does?

Thanks

[wb2001]

@BCart,

HP tests with the list stated. The I7-6700 is the best, not the i7-6700T.

[BCart]

Speccy tells me my motherboard is a 2b47.  So does the specs for my serial number.  However my motherboard does not look like the one in the picture in the link above.  My motherboard is  green and says IPM17-DD rev 1.04 on it.  Or it might say IPM17-OD