I'm currently using a laptop with a missing screen, so I've connected an external monitor which, for the most part, has worked quite well.
Problems arise, however, if I have multiple Linux distros installed, for example. Normally, with multiple distros installed, a boot menu quickly appears after start up, prompting the user to select the one they wish to load. Without a 'native' laptop screen, while connected to an external monitor, this boot menu never appears. To be more precise, the boot menu loads (of course), but it never appears on the external monitor.
This is also a problem when installing a new distro, I've found.
My solution is to remove the hard drive and temporarily connect it in another machine with a working screen, install linux, and move it back.
My question is: Is there a way to force screen output to an external monitor before linux loads (during the OS selection menu or while installing a new OS), or does a simpler solution jump out at you that I have missed?
[Edited to include BIOS information]
BIOS Information Vendor: LENOVO Version: H0ET32WW (1.14 ) Release Date: 06/15/2012 Address: 0xE0000 Runtime Size: 128 kB ROM Size: 4096 kB Characteristics: PCI is supported PNP is supported BIOS is upgradeable BIOS shadowing is allowed Boot from CD is supported Selectable boot is supported EDD is supported 3.5"/720 kB floppy services are supported (int 13h) Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Serial services are supported (int 14h) Printer services are supported (int 17h) CGA/mono video services are supported (int 10h) ACPI is supported USB legacy is supported BIOS boot specification is supported Targeted content distribution is supported UEFI is supported BIOS Revision: 1.14 Firmware Revision: 1.14