HP Envy 15t-j100 Quad CTO Notebook - needed BIOS Update

[teranz]

This information explains how I got BIOS F.72 loaded for my System Board ID 1962.  There are several sp88686.exe softpaq files available.  A key here is identifying which one will work for your System Board and won't brick your system.  The HP BIOS update software should prevent loading an incorrect BIOS file.

My (2014?) Envy 15t-j100 CTO Notebook system stopped performing the "sleep" function properly (Using Windows 10). The first sleep action after a boot the system was fine and the PC went into Sleep.  After wake if sleep was attempted again before a shutdown it always hung. I have read this was an ACPI issue and may be fixed by loading the latest/last BIOS. The softpaq 88646.exe with the latest BIOS is F.72 BIOS (2018) for HP Board ID 1962. The system had the F.67 bios from 2016. The computer also failed the same way using Linux (Xubuntu 26.04 LTS). Occasionally the system would work properly for a while but seemed to break again when switching from Battery <--> AC Adapter.

My System Board: 15SBGU-6050A2547701-MB-A02

Recent research informed me the issue could have been the EC chip LT8527E or its firmware on the motherboard, or even a Voltage regulator or maybe a capacitor.  This firmware *may* also get updated from the correct softpaq file.

It's still hidden at HP website, but they delete the support/drivers page for models over 10 years old

[Softpaq]
SoftpaqNumber=SP88646
SupersededSoftpaqNumber=SP82482
SoftPaqMD5=53cafd02959b0d2da8b50308d713e74c
SoftPaqSHA256=45961D23A57ED063273B6A8A3CEDD6C99CDC495D366E4613765D523CC0AACBB3

[System Information]
SysId01=0x1962
SysName01=HP ENVY 15,HP ENVY TOUCHSMART 15

My HP System Board is #1962...

That's on platform.ini located in the softpaq (after running the sp88646.exe)
Your board uses 01966 BIOS

[MULTI_FD]
Flag=1
FD#01=PCI,0,0,0,2C,FFFFFFFF,1962103C,01966.fd
FD#02=PCI,0,0,0,2C,FFFFFFFF,1963103C,01966.fd
FD#03=PCI,0,0,0,2C,FFFFFFFF,1965103C,01966.fd
FD#04=PCI,0,0,0,2C,FFFFFFFF,1966103C,01966.fd
FD#05=PCI,0,0,0,2C,FFFFFFFF,1967103C,01966.fd
FD#06=PCI,0,0,0,2C,FFFFFFFF,1968103C,01966.fd
FD#07=PCI,0,0,0,2C,FFFFFFFF,1960103C,01961.fd
FD#08=PCI,0,0,0,2C,FFFFFFFF,1961103C,01961.fd
FD#09=PCI,0,0,0,2C,FFFFFFFF,1964103C,01961.fd
FD#10=PCI,0,0,0,2C,FFFFFFFF,1969103C,01961.fd

[Pallipurath]

.