Motherboard Battery Change

[awings36]

I was getting an error message on my Dell XPS that my battery was low, so I replaced it. I didn't record the systems bios.. because I didn't know I needed too. Now the system won't boot. I contacted a dell chat tech and he went through several things and wants to reinstall windows. First hes had me put the old battery back in and still the same problem. I thought that i could choose to repair instead of install. It gets to where it says, enter to install windows.. R - to repair or ESC to quit and it all freezes.. Almost like the keyboard stops working. Where do I go from here. The dell dude said, I'll call you back in 3 to 4 hours! I have in now running some diagnostics on the hard drive.

 

[ubercake]

I've never heard of needing to record the system BIOS?

Does the laptop run with no battery in using the AC adapter?

 

[awings36]

It's a desktop.... sorry I forgot to add that in.

 

[ubercake]

Ah. Ok. Your disk mode probably reset to the default 'Legacy IDE' setting. Can you get into the BIOS and change the disk controller mode to AHCI? It's usually under a category similar to 'Integrated Peripherals'. Let us know.

 

[awings36]

I can get into the bios... but i'm getting lost in there. I see integrated devices... in there the parallel port modes can be changed. Is that it? The mode is set to PS/2 or AT or EPP or ECP. Is that what you mean?

 

[awings36]

I've even gone as far as to try to reinstall windows and it gives me an error. 47872.
Does this mean my harddrive needs replacing?