HP Pavilion x360 11M-AD113DX M.2 location of connector/slot.

[Markx360]

I replaced the slow HDD with 256Gb sata drive and I am having some issue on ssd drive detection. Can't update to F.42 bios , get platform fail. 

So I am thinking to install M.2 SSD drive instead. Is there any available M.2 slot/connector on this laptop? 

[Huffer]

Yes but it is a SATA SSD so uses the same SATA bus as the hard drive/SATA 2.5 SSD. The Manual is as clear as mud but it appears there is an M.2 slot which runs at right angles to the hard drive bay so you can use either an M.2 or a hard drive/2.5 inch SSD not both. I don't think whatever problem you are having will be fixed by switching to a different type of drive. 

M.2 slot circled in red???

Manual

[Markx360]

I think a bios update or sata firmware update will resolve this problem. But most likely this is HP bios issue, since I already tried two ssd's, samsung evo and gigabyte ud pro , both 256GB and both behave the same problem. 

Tried a lot of things on windows installation.  But all attempt did not resolve the issue. 

Also on windows 10 1803, I did not see any "intel sata controller" on the SATA interfaces. The driver shown is microsoft Generic SATA controller driver. 

Maybe the chipset of this motherboard is so new, so no chipset driver was written yet. Not even the driver posted by HP driver page. 

I have another post on bios F.42 installation failure. This HP laptop ssd upgrade is a nightmare! this is a lemon hp x360 convertible laptop...sad!   

[David_J_W]

HP only guarantee compatibility of their products with drives they sell (either factory installed or through HP Parts).

I suspect your issue with a failed BIOS update might be down to the partitioning of your replacement SSD. Many HP BIOS updaters need an HP_TOOLS partition - and if you don't have one and haven't left room for one, the update might fail.

I know it's a pain, but can you try either cloning the factory HDD to an SSD (resizing the Windows partition if necessary), or adjust the partitions on the SSD to leave 1GB of free space on the SSD. Hopefully then the BIOS update will work.

If you can't get the BIOS update to work any other way, try the instructions for when Windows does not start on the HP Support "Updating the BIOS" page.