Will the disk and stick boot on Lenovo without the HD inserted?
If so then it is the HD blocking them. It needs to be wiped as code in the boot sector is blocking booting of disks. If PW or DBAN will not autostart then you can slave it using USB adapter cable.
If not then the problem is clearly the disks or stick or the way they are being burned/written. This is why I went around with you on this for quite awhile at beginning. If Download tool doesn't work then use ImgBurn, Universal Installer, or UltraISO trial.
DMBAN is installed with Universal Installer , the others were installed with Ultraiso Full version
Try writing Universal Boot Disk which can test, repair and wipe the HD to USB as shown in this tutorial:
Easily Boot Ultimate Boot CD (UBCD) from a USB flash drive | USB Pen Drive Linux
You announced halfway through that CD drive wasn't working any longer but never answered why. If you haven't tried booting a Win7 installer DVD burned with Win7 Download tool or ImgBurn then you won't know for sure that a disk won't work.
You've never made it clear if you attempted to boot a Win7 installer DVD burned with Win7 Download tool as I gave you in my first post. If so did you try writing a freshly downloaded official ISO from the link given to flash stick using that tool?
Is there any kind of BIOS lock or password on the Packard Bell like there is on the other laptop? No, we cannot help you crack a BIOS password and you should not ask such a question again here.
I'd find another laptop to install HD into to wipe the HD to see if it will then autostart the installer on original machine, or install Win7 to see if it will start up on original machine - then if not SysPrep it first.