M18x beeps on startup

I have also tried the following to no avail;

To fix the issue and have your system working again, please perform the following steps:

1. Remove the system battery.
2. Remove the Ac/adapter.
3. Hold the power button for 30 seconds without any power source.
4. Plug back the Ac/adapter only.
5. Hold the “FN” key and without releasing the key, Power "ON" the computer.
6. After step 5, you will notice the system will try to turn "ON" and after 5 seconds will restart, at this point you can release the “FN” key.
7. The computer will POST and starts loading Windows.
8. Shutdown your computer and plug back the system Battery.

Also tried removing the CMOS battert for 1 hour and reseating memory, still same beep codes.

Hi nemisis2013.,

The one beep code indicates that the BIOS corruption or system board failure, Depending on the warranty status we can help you further, please use the link below to check the warranty status.

http://dell.to/YeuzUO

Please punch in the system service tag or express service code. In case your system warranty has expired please contact the Out of Warranty department 1-800-288-4410 (U.S.Customer only). In case your system is under warranty please send me the system service tag or express service code through a private chat, so that I can help you further. 

Click on my username select start conversation and send me the details.