Fix BIOS settings not being saved

When beginning the pc, I see error messages like:

Press F1 to proceed, del to enter setup.
CMOS date/time not set.
Press F2 to run setup. Press F1 to load default values and continues.

These are issues associated to actual time errors on the mainboard ( realtime ). Make each pc boot should press the above keys to enter home windows. And you must reset the time you possibly can entry the community, although the community remains to be regular. Because the machine can’t save the date and time, save the settings within the BIOS. Please information me the right way to repair the error of not saving BIOS settings.

Often such errors are attributable to a lifeless CMOS battery. This battery is used to feed the time and BIOS settings (even when unplugged). We simply want to interchange the brand new battery. Or you need to use the VOM meter to regulate the 10v scale, put the black rod on the –  pole, the purple rod placed on the + pole of the battery and measure whether or not there’s sufficient 3v or not. If sufficient, the battery remains to be good, not sufficient to interchange the brand new battery.
If the CMOS battery remains to be there, then we take away the battery, use a razor to scrape the battery contact level on the mainboard after which connect it to check. Some mainboards are used for a very long time, the contact factors are oxidized, making good contact.

1. 

2. Verify if the clear CMOS jumper jack remains to be leaping, see if it is plugged in appropriately. Mounting jumpers at pins 1, 2 is regular (regular) and a couple of, 3 is obvious CMOS. Often mounted in place 2, 3 is not going to energy on.
   Verify if 3-pin diode has 3v fed from CMOS battery? The CMOS battery anode gives 3v for a resistor (or coil) on the opposite finish will give 3v for the 3-pin diode. To find out the 3-pin diode, we alter the clock to the x1 scale, and 1 stick is positioned on the constructive pole of the battery, 1 rod is positioned within the resistors, coils close to the battery space. See the circuit (clock as much as the top of the needle), then deduce the CMOS battery degree 3v for that resistor. Additionally alter the x1 scale, we discover the diode by measuring on the opposite finish of the resistor (the brand new resistor measures continuity with the + terminal, then we measure the non-connected finish) to the close by 3-pin diodes, which sub-circuit is that pin has 3v.
   If measured on a 3-pin diode with out 3v, we’ll substitute one other diode.
   The three-pin diode has 3v, then we proceed to reload the BIOS by going to the homepage to obtain the BIOS of that mainboard to load it with the loader. Or improve the BIOS in home windows for the ASUS primary I discussed within the article: replace bios ASUS .
   Lastly, you proceed to solder or substitute the IO chip. If not, then substitute the southbridge with one other chip. This circuit has 1 enter to the IO chip and 1 line to the Southbridge chip.These are the steps to repair the machine with out saving the date and time as a result of battery working out, unplugging the ability, or the chip on the mainboard. Wishing you success.