I have been using your X5DA8 main board many years. I am facing a problem after my CMOS battery died. I installed a new one and set the time, but now every time I boot up the system gives an error "-error 0251 checksum bad Press F1 to continue." How can I correct this issue?
Please perform a CMOS clear (see manual for details), after that enter the mainboard BIOS. Load BIOS defaults, set current date and time, save and exit. This will resolve your issue.