BIOS does not boot from ODD or External Drive

Megahertz07 · 31 Jan 2018

Did the laptop came with Win 7 or Win 8?

To enter BIOS you press F2.
Boot order press F11. Pag 125
Sony eSupport - VPCEB23FM - Support
https://docs.sony.com/release//VPCEB2_series.pdf

Falco276 · 11 Feb 2018

I apologize for not coming back to this. I did not want to leave this thread dead for days.

Out of the outcomes of this problem, let's break it down:

1) If I insert the Win 7 ISO disc, BIOS will not boot from it.

2) If I insert an external drive with Win7 ISO files, BIOS will not boot from it.

3) My BIOS does not possess Legacy or UEFI boot features.

4) My BIOS will only boot to internal drive, most preferably with the Samsung SSD resulting to a god awful boot to desktop screen or my Toshiba SSD with the 'No Operating system Found' message.

5) I can't replace my ODD because I think that's not the case of broken hardware resulted into this situation.

6) I have to say there is something wrong with my dual CMOS perhaps. If the RTC battery stores all of the important BIOS files then I say that it might be corrupted or something. I don't get any system beeps of any kind such as an RTC failure but I might have to say one my Dual CMOS cells are on the verge of dying.

Do anyone of you think it could be this problem perhaps?

Should I replace my CMOS instead? :/

Snick · 11 Feb 2018

It's almost impossible to provide an effective solution if you don't follow recommendations exactly and then post the results. I see this scenario repeat quite often and as an individual trying to provide free assistance, it is extremely frustrating, to say the least.

How have you been trying to enter boot sequence to boot from Optical Drive?

Method: insert DVD into OD, if you have to turn on the computer to open the drive, insert the disk, then power down the machine. Power on computer and immediately start pressing an F key Megahertz07 is probably correct that is is F2, (mine is F9 but have HP and Compaq machines), however, trial and error always works, and you'll then know what all the other F keys do at boot-time. If you don't begin pressing an F key soon enough it will boot to the first available drive in the current boot sequence. You only need to replace your CMOS battery if setting don't remain, i.e., most notably your system time changes. (your local time zones is most likely not the same as the bios default).

Even if you have no HDD or SSD in your machine, if you press the appropriate F key it will enter the boot screen as the BIOS chip is on the motherboard, you can then peruse the menu and determine which keys to press to select the OD. It's that simple. The first time I tried I started at F1 and when through F12, some keys do nothing, some keys do the same as another.

If BIOS doesn't recognize your OD there may be a connection issue or the drive may be defective. If the connection are ok and Bios NOT showing the drive its EITHER the drive itself....OR the drives motherboard controller.