S10-3: Change BIOS boot device sequence with + - keys does'nt work

Question

I want to boot my IdeaPad S10-3 from an USB HDD.
In the default BIOS setting this is the 4th or 5th line in the boot device list.
The help instructions in the right column of the BIOS page tell me to use the <+> and <-> keys to move an entry up or down. When I do this, the BIOS only responds with annoyed beeps.
If the keys refer to a numeric keypad: there is none, and neither an indication how to map one onto the existing keys.
Is this Netbook delivered with a BIOS that was designed for other PCs ?
A workaround is to press <x> twice on a device above the desired boot device:
The 1st press excludes the device, the 2nd press moves it to the end of the list.
In this Forum I have found hints that "incorrect" changes of the boot device list may disable the internal harddisk, but I can't find precise definitions of "correct" changes that avoid this.
Do I miss something or this just an improper BIOS ?

Answer 1

Hi KalvinKlein,
before I received your new Info about Fn+Insert , I had once more checked Fn-F7 : no effect in the BIOS.
I have also tried all non-character keys plus the "Umlaute"-keys on the German keyboard with the following result:
The key right of the "0" shifts boot device entries down in the list.
On the German keyboard this key is labelled with " ß ? \ ".
The next key on the right and left of the "Backward-Erase"-key, labelled with " ´ ` ",
pressed together with the Shift-key, moves list entries up.
Using these keys I have then set the Boot device sequence according to your suggestion :
1: USB CDROM
2: USB HDD
3: HDD
My USB-Memory stick (with BartPE installed) had been recognized as a USB HDD.
After saving with F10 and <Return> the Netbook responded with a Beep and nothing further happened.
I had to switch it off with a long press on the Power Button.
Switched on again, <F2> pressed, BIOS checked,, o.k. <ESC>,
loads Ramdisk image of BartPE from the USB-stick,
starts BartPE with XPE.
Checking available drives in the Windows Explorer resulted in :
RAMDISK ( "B:" )                (used by BartPE for temporary storage)
USB ("C:")                         (the USB-stick with the BartPE-iso file)
"Wechseldatenträger / Removable storage device"           obviously refers to an unused USB-Port
-volid ("X:") "CD-drive"    but actually another Ramdisk containing the expanded and running BartPE package
The internal harddisk is not visible !
I wonder whether this is a problem of the BIOS or whether I require special harddisk drivers (Intel Matrix Storage manager/driver or  possibly AHCP drivers) for Windows XP, because my present BartPE version is based on XP, while the Netbook came with Windows 7 Starter Edition.
Further helpful hints would very much appreciated.
Kind regards