Error Code: 2000 -0221 "msg: Timer - Interval Timeout not Functional Dell N5010

SOURCE: 0334

That message indicates that you did not input during the diagnostic that you could see the test. If the system is running normally, then the error can be ignored.

SOURCE: my dell n5010 laptop is

Hello

Your hard drive is failing and should be replaced as soon as possible. If you can still boot the computer, be certain to copy/backup any important files that you have created or saved (documents, music, etc.) to an external drive.

If your computer is still under warranty, contact Dell for a replacement drive. Some Dell warranties are in-home service, so check your warranty. Unfortunately, to get warranty replacement, you'll need to contact Dell, first. This should get you started:

http://support.dell.com/support/DPP/Index.aspx?c=us&cs=19&l=en&s=dhs&~ck=mn&SystemID=inspiron_N5010
If out of warranty, you could purchase from Dell, but any 2.5" 9.5 mm SATA notebook drive will work. Your operating system (Windows 7, etc.) and software would need to be reinstalled.

Hope this helps.

SOURCE: DELL portable XPS M1530 Error Code 0146 Msg =

you have a missing start up driver try to trouble shoot run windows on f12 promp f2 then asked to run windows run windows.

SOURCE: When I started my DELL Inspiron 1525 running Win 7

2000-0142 and 2000-0146 are hard drive SMART errors, indicating the HDD will fail.
To boot message about the AC adapter was a BIOS level message that normally appears when a Auto/air ac adapter or other 65 watt ac adapter is used to power the system.

SOURCE: im getting error code 2000-0146

According to Dell, it appears that your hard drive has failed due to the shock of the fall. See below:
http://en.community.dell.com/support-forums/laptop/f/3518/t/19269780.aspx