You can remove the hard drive and start the laptop without it. Here’s my previous post witch covers troubleshooting bad images on the screen in more details.
If the noise is gone, the hard drive is your problem. If the laptop makes clicking or grinding noises and you still have video on the screen, you can run a hard drive test utility.
My problem is that my computer has no floppy drive. You could buy a external floppy drive or will it run from a usb stick.
I know I could burn the file to a CD and then boot from CD but how do I know if the files will will run from the CD when meant for a floppy? To do a BIOS update from Floppy Disc etc you need more than the BIOS update.
If the bios update exactly says it fixes your issue then you may try it.
If your laptop does not start at all or it starts but will not boot properly, it’s possible that you can fix the laptop at home without taking it to a repair center. I’m not sure if I can cover all situation at once, so I will update this post as more examples come into my mind. First of all in this situation check the AC adapter. If you cannot do that, find a known good AC adapter and use it for testing the laptop.
You plug the AC adapter but the LEDs (power light, hard drive light, battery charge light, etc…) do not light up and the laptop will not react at all if you press on the power button.
I have the file for installing it with Windows, but I don't have Windows installed on this computer. What can I do to update my BIOS from A07 to A11 now?
Most likely there is nothing wrong with the adapter but just in case test it with a voltmeter to make sure the output voltage is correct. Unplug the AC adapter, remove the battery and wait for 1-2 minutes. Try reseating the memory module, just remove it from the slot on the motherboard and install it back.
After that plug the AC adapter ans try starting the laptop again. Try installing the memory module into the other slot (if it’s available).
I have, in the past, written image files of Dos boot floppies to cds to get a proper Dos boot cd - you'd end up with a coaster after your single use, but it saves messing about getting Dos and USB to work together (mkisofs's -b option will get you going). It will tell you your system info, your current bios rev, and list all available bios revs, then ask you what to do.
Edit: As ~quack pointed out below, this script uses the same repository that you reference in your question, so of course it won't work. the faq on that link indicates it works with the dell firmware tools: " Q: what does this script do?