Operating System Not Found - Any Kind of boot

June 6, 2011 at 05:39:45
Specs: Windows XP
A Toshiba A135-S4437 laptop. While booting it gives this "Operaating System Not Found" error when trying to boot into HDD. I also tried to boot into CD-ROM, USB stick and even the hardy old floppy drive. The same error everytime. its like the BIOS isnt even trying to initiate the boot procedure. The USB stick does blink as if its being acessed. I tried removing the HDD and trying to boot from the other devices..... but nothing. I heard this specific BIOS is glitchy with some auto password lock and all. I cant even update my BIOS cause i cant boot to any of them. Could this be a BIOS virus, a faulty BIOS or ...? I checked all BIOS settings and even reset the BIOS settings. Please HelP!

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#1
June 6, 2011 at 06:12:40
Make sure the BIOS boot order is set correctly. The CD/DVD drive or USB must be listed before the HDD. Is the HDD detected in the BIOS?

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#2
June 6, 2011 at 06:17:42
It isnt an issue of order of boot.

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#3
June 6, 2011 at 09:32:26
"It isnt an issue of order of boot"

"I also tried to boot into CD-ROM, USB stick and even the hardy old floppy drive"

The computer can only boot in the order it's configured for. If the order is correct (floppy / CD / HDD), the system will 1st attempt to boot from a floppy. If no floppy is detected, it will try the CD drive. If no bootable CD is detected, it will try the HDD. If no HDD is detected or the HDD is defective or there's no OS on the HDD, you'll get the "operating system not found". Also, if you leave a non-bootable disc in the floppy drive, the system will stop the boot process & display "operating system not found".

Please answer my other question - is the HDD detected in the BIOS? If it's not being detected, there's your problem.


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#4
June 6, 2011 at 15:10:53
let me just clarify this. i tested each of the bootable options(CD, USB, HDD) directly by selecting them through the boot option( a menu which lets u select the device to boot first regardless of the order saved in bios). I even removed the HDD so that the bios doesnt try to boot into it first regardless of my choice so as to test my other bootable media. I even kept the related device at the top of the list while trying to boot it in the BIOS boot config. It isnt the simple BIOS boot order issue.

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