I've been working on my friends HP Pavilion p6-2054uk with an H-CUPERTINO H61 motherboard, that had an HD failure.
I replaced it with a 240GB SanDisk SSD Plus drive and did a clean install of Windows 7 Home Premium SP1 64-bit as well as trying Professional.
Windows updates were not installing despite trying two MS progs etc. Viewing a forum, someone found that they were able to install updates using a Wireless NIC, though not the Wired.
I attempted the same, disabling the Wired in Device Manager, with no effect they disabling in the CMOS setup.
Now all I get when booting up is the initial POST information with the machine spec then 'Press the ESC key for startup menu'
I've tried clearing the CMOS using the jumper and leaving the CMOS battery out half an hour, though this probably only holds Real Time Clock information and not the rest of the CMOS data.
I'm not finding many results for what's on the motherboard:- CLEAR_PASS, CLR_CMOS etc. It looks like HP like to keep the recovery service 'in house'!
I've worked on HP 8000 and 8300's, when I've needed to disable the onboard NIC to use a fibre card, with no problems.
The optical drive, hard drive and Wireless NIC have been disconnected and the sticks of memory used one at a time in both slots as well as the SATA and USB leads to the board.
The only response is when pressing 'F9' which reports 'Boot Menu' and 'ESC' which says 'Startup Menu'.
Thank you for any response, Nigel