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<blockquote data-quote="iTrendsNET" data-source="post: 320406" data-attributes="member: 15207">[USER=27614]@donetao[/USER] - Bad CMOS is not too crazy a thought! In&nbsp; my experience, that applies more to very old machines or those that have sat for an extended time unplugged and in storage. If he does not have to reset at every boot the CMOS battery should be OK.Also, I think the L650 came from the factory with Windows 7, so no UEFI.** Based upon your latest reply, I think you can ignore the bottom suggestion. Suggest you try another make / model of HDD since the other drive you just tried worked.** If you want to take a shot in the dark before considering returning the HDDs for a different brand / model, you could trouble shoot the memory. I would assume this laptop has 2 memory cards. With the unit powered off, I would remove 1 card and see if this makes a difference when trying to get BIOS to recognize the new drive.&nbsp; If doing this with the first memory card does not work, remove it and try it with only the second card. I had a desktop brought to me after a high priced network tech said hard drive failure and no way to recover the data. I checked it, said no way, pulled one memory stick and the machine booted with no errors.&nbsp; So I ended up tossing in a new $30 memory stick and the HDD is sill working fine.</blockquote>

[QUOTE="iTrendsNET, post: 320406, member: 15207"] [USER=27614]@donetao[/USER] - Bad CMOS is not too crazy a thought! In my experience, that applies more to very old machines or those that have sat for an extended time unplugged and in storage. If he does not have to reset at every boot the CMOS battery should be OK. Also, I think the L650 came from the factory with Windows 7, so no UEFI. ** Based upon your latest reply, I think you can ignore the bottom suggestion. Suggest you try another make / model of HDD since the other drive you just tried worked.** If you want to take a shot in the dark before considering returning the HDDs for a different brand / model, you could trouble shoot the memory. I would assume this laptop has 2 memory cards. With the unit powered off, I would remove 1 card and see if this makes a difference when trying to get BIOS to recognize the new drive. If doing this with the first memory card does not work, remove it and try it with only the second card. I had a desktop brought to me after a high priced network tech said hard drive failure and no way to recover the data. I checked it, said no way, pulled one memory stick and the machine booted with no errors. So I ended up tossing in a new $30 memory stick and the HDD is sill working fine. [/QUOTE]

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