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Why won't BIOS find the correct boot media?

By martynmoore ·
My Win10 PC often goes through the BIOS boot-up and then tells me: "Reboot and Select Proper Boot device or Insert Boot Media in selected Boot device and press a key".

If I Ctrl+Alt+Del it reboots fine. If I check BIOS settings and Save, it boots OK about five times then fails again. I have four HDDs for video content storage and a Samsung SSD with OS and apps.

I've updated the BIOS and fitted a new battery.

Any ideas?

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BIOS CMOS Battery

by mjd420nova In reply to Why won't BIOS find the c ...

When the CMOS battery fails, the BIOS forgets its settings and can set a jumbled and inoperative set of parameters. Replace the battery and insure the old one hasn't leaked or corroded the terminals.

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I already did this

by martynmoore In reply to BIOS CMOS Battery

And I said so in the original question.

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Sorry

by mjd420nova In reply to Why won't BIOS find the c ...

It appears that your BIOS/CMOS circuitry has faulted. A MOBO replacement is called for.

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No need to apologise

by martynmoore In reply to Sorry

In that case I'll just leave it turned on.

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SSD might be faster than Bios POST

by nidal.kamal In reply to Why won't BIOS find the c ...

Good day,

Try the following before saying it is BIOS/CMOS circuitry has faulted:
1-Update the BIOS.
2-If that didn't help, try to access the BIOS and set delay boot 5 sec. BTW, one may alter the delay boot time to get the best result.

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That's a good idea

by martynmoore In reply to SSD might be faster than ...

I have five drives in this case and it does seem to give the BIOS a lot to do at boot-up. And when the machine was new, with only two drives, I shortened the delay to almost zero.

I like this suggestion and will try it at the next boot.

Thank you!

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SSD might be faster than Bios POST

by nidal.kamal In reply to Why won't BIOS find the c ...

Good day,

Try the following step(s) before confirming BIOS/CMOS circuitry failure:
1-Update the BIOS. If that didn't help;
2- Try to access the BIOS and set delay boot 5 sec. BTW, one may alter the delay boot time to get the best result.

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Why won't BIOS find the correct boot media?

by jcwfbi In reply to Why won't BIOS find the c ...

You mention it boots OK 5 times and then fails again, what are your boot options and their order?

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UEFI BIOS?

by TheChas In reply to Why won't BIOS find the c ...

Is the motherboard a UEFI class motherboard?
If so, was the SSD the original OS drive?

Sometimes when you clone a drive for a UEFI system, the cloned drive does not properly register with the BIOS. You will need to review the UEFI process and options for your motherboard and BIOS and then register the boot drive.

If the system keeps proper time and any other BIOS settings hold when power is off, I would not suspect a BIOS/CMOS issue. However, there could be an incompatibility or conflict between the SATA controller on the motherboard and the SATA interface on the SSD.

Might be worth checking with the drive manufacture for a firmware update.

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Along with Chas's suggestion

by HAL 9000 Moderator In reply to Why won't BIOS find the c ...

Is your Boot Drive which I'm supposing is a SATA Drive connected to the lowest SATA Drive Connector?

Sometimes with multiple drives you need to have the Boot Drive connected to SATA 0 or 1 depending on the maker of the M'Board for it to Boot Reliably. I've only seen this happen when there are multiple drives in use and the drives get changed about so the actual early Boot Records which are copied to the drive connected tot he Lowest SATA Connector get moved about or formatted.

Then BIOS has difficulty in finding the Boot Drive.

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