"Screen
is completely dead, no BIOS, no beeps".
By "no BIOS" I
assume you mean you can't get to the CMOS setup menu.
If that's the case, then "no BIOS, no beeps"
usually means the CPU is toast.
Assuming you've tried
Matt's suggestions, if it's still a no-go, see
this
post of mine on the PCmag board,
for why the 4-second soft-off still works. (Not to be
pedantic, but it's always 4, not 5 seconds).