Okay so no resolution for the problem. I have a Qosmio G35 series that starts to boot, but goes directly to the blinking cursor on the upper left of the screen after the splash window, then the cursor disappears and the screen is blank. I've seen other folks swear it is the hard drive limitation that causes this, and yet others say it isthe usb drivers being updated to service pack 3 that does it. But none of this helps me. I can't get into the machine to fix any of it...

SOURCE: toshiba qosmio G35 AV600 refurbished laptop

if you have the CD driver for your laptop (audio driver) try reinstalling it.

SOURCE: Display problem

could be 2 main causes, either the LCD converter under or behind the screen under the beizel has failed and is messing up the display, or simply the sreen could have been cracked at one point, either way these parts have to be obtained from toshiba.. EMPR do toshibas spare parts, if you are in australia

www.tosh.empr.com.au

SOURCE: Toshiba won't boot

 You can boot from XP cd.
When prompted..press [R] this will launch recovery console.
Choose your windows installation (typically by pressing [1] press return..
When prompted for password type chkdsk /r
Press return..Windows will fix errors..type Exit and press return..
Let me know if that helps.

SOURCE: cant boot

If you are sure no one has tampered with it and entered a HDD password and it is not prompting for a password then it is most likely a HDD failure. It is possible the BIOS will still recognize the HDD. Try disconnecting and reconnecting the HDD if you can access it there should be screws on the bottom marked with a cylinder symbol.

SOURCE: hard drive not seen in windows xp

It is not showing up in XP yet because it has to be partitioned and formatted first. You can see it in disk management and partition it from there, then format it.