I recently lost the CMOS battery on a Dell PW410 (simply run down, after many years).  I replaced the CR2032, got the entire machine working again, but now the "Press ..." message is no longer displayed during POST.  The Dell logo is displayed, arbitrarily pressing F2 -will- get me into CMOS set-up, and everything else seems to be working normally.  Tried re-flashing Phoenix BIOS A14, to no effect.  What else could block display of that message?