Asus laptop bios problems

[New_tech123]

 

Hello,

I received two Asus laptops today from two different people with a weird problem. 

They cannot detect the internal drives in the bios. They keep on booting into the bios at startup.

I've tried everything and the only way they can be detected is if I disable secure boot and activate CSM.

The only problem is that when I do this, it doesn't recognize the hard drive as a bootable device.

I've tried different HDDs with different OSs.

They both have the same processors (I5 8250U I believe with 8g of RAM) with slightly different mobos. Both have Aptio bioses.

The test HDD's had fresh installs.

 

Edit: One came in with a dead hard drive and I've put the specs back to default. Both are using AHCI (can't change it).

 

Edit #2: do you think a faulty cmos battery could be causing this?

 

Any clues?

 

thanks

 

[Jurrunio]

corrupt boot drives?

[New_tech123]

Just now, Jurrunio said:

corrupt boot drives?

I've tried different hdd's with fresh installs of two different os's.

I also tried a fresh HDD.

I did see that the date keeps on going back to 2015 on one of them... Could it be the cmos battery? But why can't I see the drives? (one even has a CD drive and it doesn't detect it!!!)

[kb5zue]

Replace the CMOS batteries with new batteries for starters.  That would take care of the problem with the machine maintaining the correct date, and would also allow the BIOS to "remember" the settings after you change them.

[New_tech123]

I'll try it when I get in. I didn't have them with me last night so I was going by what I remembered. Also, I always f10 when I do modifications. Thanks. Let's hope it's this because if not, I'm afraid it'll be Mobo issues. It's just weird that I get two laptops at the same time with the same problem. Like why would I be able to detect them when I'm in CSM and not the other way around. And why would the cmos battery have anything to do with this fact. I've had tons of bad cmos problems but never this.