Warning: MAIN BIOS CHECKSUM ERROR!Retrieving recovery source from HPA..HPA BIOS not available!!Retreiving recovery source from Back BIOS.... Done!Writing BIOS Image..... _____K OK
Hi there,from your description it would seem that the main BIOS has become corrupted and it is reverting to the back-up BIOS.First off how did you update the BIOS did you use @BIOS or QFlash?Whichever method you used I would recommend doing an extended clear of CMOS first. Remove the power supply cable to the PC and remove the CMOS battery for at least one hour.If the problem persists then re-flash BIOS with F7 using the QFlash utility. Make sure that you disable the "Keep DMI Data" option on the QFlash homescreen before you actually run the update.Hopefully one of these steps will cure the problem.
HiA little more information on your sytem wouldn't go amiss for a starters.Try removing al the RAM apart from a single stick in the first slot.