Notebook Boot and Lockup

Please Help!

Laptop has always worked fine.  Updated the Bios to latest ver F.71 last month and has been fine. Decided to install mSata SSD cache to allow HDD to boot up faster. After that Windows did not boot properly, Windows automatic recovery tried but failed. Went into Bios F10 key, disabled secure boot, enabled Intel RST and enabled legacy support. Could now see Intel RST flash on screen at boot up for the mSata and HDD. Looked fine. (also Ctrl-I would display the drives).  Went back into Bios and re-enabled secure boot and disabled legacy support. Windows 10 still not bootiing up correctly automatic repair attempted failed. Chose on the Windows recovery screen "boot from usb/dvd device" and put in my dvd  HP recovery disk. The system did not boot from the recovery. Powered down the laptop. The screen is now always black (no video or test whatsoever on screen) and can not get into Bios with F10 key. 

Troubleshooting attempted:

Tried to boot computer after all these tasks.

removed mSata (left this out - not putting back in)

cleared RTC by removing the battery connection

Hard reset the computer

removed memory modules and tried swapping or using one

Bios recovery using usb flash

removed HDD ... now back in

removed WiFi card - now back in

removed laptop battery

other startup key presses , esc,  F1, f9, f11

Summary: power turns on, fan spins up and stops, black screen, WiFi LED on orange, no other leds on or flashing (ie no caps lock leds)