Check battery with multimeter set on Ampere. Does the battery deliver something like 100-200mA? (Don't check long, this is short circuit current) If not, it is dead.
And yes, you can accidentally swap one dead battery with another one.

I'll check it although I think the case of a brand new branded dead battery is abysmal low

Does the bios keeps any setting at all ?

I dont like to say it but *could* be a capacitor issue ...

if you have a multimeter yuu could also follow the 3v power from the battery (with the PC switched off) to the bios and chipset to see if some component like a resistor or trace is interrupting the power

Good luck !

if you have a multimeter yuu could also follow the 3v power from the battery (with the PC switched off) to the bios and chipset to see if some component like a resistor or trace is interrupting the power

I'm afraid that this has to be done , I also saw on youtube that sometimes is the crystal or the soldering to it

Does the bios keeps any setting at all ?

no nothing I don't care much about date but I want to play with the AGP multipliers , with the default settings it is stuck in 4X and theese are the only working

laios67 wrote on 2024-05-14, 16:59:

I'm afraid that this has to be done , I also saw on youtube that sometimes is the crystal or the soldering to it […]
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if you have a multimeter yuu could also follow the 3v power from the battery (with the PC switched off) to the bios and chipset to see if some component like a resistor or trace is interrupting the power

I'm afraid that this has to be done , I also saw on youtube that sometimes is the crystal or the soldering to it

Does the bios keeps any setting at all ?

no nothing I don't care much about date but I want to play with the AGP multipliers , with the default settings it is stuck in 4X and theese are the only working

- the crystal is probably not the cause.... it would cause your date and time tro freeze or the pc not to boot but not loose your bios settings
there are not many things that make the bios settings to be lost...
- either the power circuitry that keeps it alive is not working but in this case the settings would probably only be lost after a shutdown witch seems to be the case.
- or the CMOS memory is being affected by something like capacitors or the memory itself is damaged

Can you reflash the bios ?
I have had bios behaving a little crazy like loosing values and not displaying info correctly that were corrected by a bios reflash

cheers

Corrosion on battery contacts?

I reset the bios again , longer time shorted , and it seems now ok , shutdown several times the settings are there hope that was just as simple as it seens

laios67 wrote on 2024-05-15, 16:19:

I reset the bios again , longer time shorted , and it seems now ok , shutdown several times the settings are there hope that was just as simple as it seens

wonderfull 😀