Why are you messing with a mboard a tech said is no good? Some techs are incompetant, or don't put in the time to figure out what is actually wrong unless the customer pays for their time, but some actualy know what they are doing.
" I cleared some memory etc and up she booted."
Explain what you did.
A USB keyboard should work by default n this relatively recent system.
You don't ever need USB keyboard drivers to get into the bios, support for that is already built into the bios, and if you had a working hard drive with Windows on it, the USB keyboard is automatically found by Windows and built in drivers are installed for it.
The only reason you would need drivers for a USB keyboard is if it has special purpose buttons on it - everything else standard is already supported.
NOTE that some keyboards have a button you must press to activate the F keys! It does not require drivers.
I see no indication you would need a bluetooth keyboard to get into the bios - a USB keyboard should work (if it is enabled in the bios) on this recent computer, just as PS/2 keyboards are always supported to get into the bios in older bioses and most newer ones.
You could try clearing the cmos (see the service manual, below), but it probably won't help (unless the support for USB keyboards has been disabled).
If Legacy USB devices or USB keyboard is turned off in the bios, you can't get into it with a USB keyboard, but it will work in Windows in any case.
You can probably cure that problem by clearing the cmos.
DELL XPS 410
http://www.dell.com/content/product...
Including:
"Legacy:
PS/2: two 6-pin mini-DIN (with optional PS2/Serial card)
Serial: 1 (with optional PS2/Serial card)"
One PS/2 for a keyboard, the other for a mouse.
Good luck connecting up a PS/2 port without those optional cards.
I see no info about the pinouts in the Service Manual.
Service Manual - in seven pieces:
http://support.dell.com/support/edo...
One piece - System Setup
http://support.dell.com/support/edo...
Including:
"Entering System Setup
Turn on (or restart) your computer.
When the blue DELL™ logo is displayed, watch for the F2 prompt to appear.
Once the F2 prompt appears, press <F2> immediately.
NOTE: The F2 prompt indicates that the keyboard has initialized. If you press <F2> before you are prompted, the keystroke will be lost."
In other words, you do not get the prompt to press F2, and you can't get into the bios, unless the keyboard is recognized.
..
Applies if there is a hard drive that is working and has Windows on it:
"If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft® Windows® desktop, then shut down your computer (see Turning Off Your Computer) and try again."
.....
The bios won't boot from the DVD drive unless an optical drive (CD or DVD drive) is in the boot order in the bios and the drive has a bootable CD or DVD in it.
If the DVD drive is recognized by the bios you may see it's model number on the first screen as you boot, if that isn't obscured by the logo screen.
Normally the floppy drive is listed first, if one is installed, then an optical drive, then a hard drive. If a floppy drive is in the boot order, and if no bootable CD or DVD and no bootable hard drive is found, you will be prompted to provide a bootable floppy if no bootable floppy is found.
Clearing the bios will probably cure the problem of an optical derive not being in the boot order - see the Service Manual.
If there is more than one optical drive, try the other one - some bioses will only boot from one optical drive - the first one detected, or the first one specified in a list of optical drive models in the bios Setup.
That's assuming the optical drive(s) is(are) correctly connected, and jumpered (if applicable, if it's IDE), of course.