Can't boot into Windows 8 Single Language 64 bit or access the BIOS screen with the F1 key

I have in my possession right now a Lenovo E49, Model name: 3464
I am unable to access the BIOS settings at POST by pressing the F1 key.  Neither does it respond to the Enter key when it displays the message "To interrupt normal startup, Press Enter".  I am also unable to boot into the installed OS Windows 8 Single Language 64 bit.
For your informtion, these are the events that led to this issue.
I accessed the BIOS settings at startup using the CHANGE PC SETTINGS option in the CHARMS menu in Windows 8 Single Languge 64 bit followed by GENERAL and ADVANCED STARTUP.  Then I chose Restart Now.  Windows restarted to produce the startup screen where I chose Troubleshoot, followed by Advanced Options and UEFI Firmware Settings, followed by Restart.  This took me to the BIOS settings screen. Once there I changed the boot settings in BIOS so that SECURE BOOT was turnned OFF.  It was in ON state prior to that.  I also changed the BOOT MODE to LEGACY ONLY.  I also changed the BOOT ORDER to boot from DVD drive first followed by the Hard Disk and USB Hard Disk.  I saved the changes by pressing F10.
Now the computer is able to boot from the DVD Drive.  I tested this by inserting a Windows 7 Repair DVD and also a Linux Live DVD.  Mind you, I didn't mke any changes to the Hard Drive.  I'm also able to boot from a USB Hard Disk.  This too was tested by inserting a bootable USB HD that had both Windows 7 and Windows 8 OS installers.  I used only the command prompt feature in the Repair option on the Windows 8 installer to ensure that I could access the partitions on the HD.  I did not in any way install Windows 7 or 8 on the HD.
If there is no bootable DVD or USB HD inserted, the laptop is involved in a loop that restarts followed by a message that says the following:
"Intel Undi, PXE-2.1 (build 083)
Copyright (C) 1997-2000 Intel Corporation
This product is covered by one or more of the following patents:
US5, 307, 459,  US5, 434, 872,  US5, 732, 094,  US6, 570, 884,  US6, 115, 776 and US6, 327, 625
Realtek PCIe GBE Family Controller Series v2.41 (06/08/11)
PXE-E61: Media test failure, check cable
PXE-M0F: Exiting PXE ROM."
I am positive that the current state of the BIOS is such that it does not accept any input keys like F1 and F12 at POST so that the BIOS can only be accessed through Change PC Settings in Windows 8 as I had done prior to the occurence of the issue.  Since I cannot boot up Windows 8 I cannot use this method to access the BIOS.  And since it is not possible at this stage to access the BIOS settings through the F1 key, I believe Lenovo must have surely provided another alternative to enter the BIOS.  Can you kindly tell me what other way is there to do this.  In earlier days, one could reset the BIOS by shorting the BIOS through pins on the motherboard.  Is that possible now?  Or is there some Lenovo BIOS utilily that enables me to change the BIOS setting to boot with Legacy and UEFI?  Or do I have to install Windows 8.1 64 bit in Legacy mode?

I'll see if another member of the team can jump in here and offer more help...
What I might imagine is that you can only access BIOS from a cold boot. Windows 8/8.1 have hybrid shutdown and don't completely shut down the machine normally, so even when it powers off, it isn't fully off and the next boot is not really a cold boot.
Please see this KB.  I realize this assumes you can get into windows.
As you suggest, it also seems as though you have set legacy vs UEFI and that may be why your drive is not currently booting.   Can you remove the battery on your system?  If not, is there a reset hole on the bottom?  Removing battery and AC and pressing and holding the power button several times, then re-attach AC and Battery and try to restart and press F1 to get into BIOS.  (Not familiar with models that use enter for BIOS).
Mark
ThinkPads: S30, T43, X60t, X1, W700ds, IdeaPad Y710, IdeaCentre: A300, IdeaPad K1
Mark Hopkins
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