06-12-2014, 05:22 AM
Hello!
The CR2032 CMOS battery voltage is SUPPOSED to be 3.2 V. I'd change it. It could be producing a fairly decent voltage and, at the same time, not provide adequate current to properly run the oscillator.
After that, keep a watch on the system time in the BIOS, as well as in the OS. If it continues to change, and you're CERTAIN that your power supply's good (I'd change THAT, also, if you have a known good spare), then you most likely have a weak component in the oscillator portion of the real-time clock - most likely, a capacitor.
Some computers display the power supply voltages in the BIOS, but I use a special tester that cost me around $30, just to check power supplies. It gives me a digital display of both voltage and amperage for ALL the outputs.
Look at the electrolytic capacitors on the motherboard (they look like little cans). If the tops of ANY of them are bulging or have ruptured, then the motherboard is pretty much history. You could 'recap' it, but at that point, it'd be cheaper to buy (or scrounge) another old machine instead...
73 DE N4RPS
Rob
The CR2032 CMOS battery voltage is SUPPOSED to be 3.2 V. I'd change it. It could be producing a fairly decent voltage and, at the same time, not provide adequate current to properly run the oscillator.
After that, keep a watch on the system time in the BIOS, as well as in the OS. If it continues to change, and you're CERTAIN that your power supply's good (I'd change THAT, also, if you have a known good spare), then you most likely have a weak component in the oscillator portion of the real-time clock - most likely, a capacitor.
Some computers display the power supply voltages in the BIOS, but I use a special tester that cost me around $30, just to check power supplies. It gives me a digital display of both voltage and amperage for ALL the outputs.
Look at the electrolytic capacitors on the motherboard (they look like little cans). If the tops of ANY of them are bulging or have ruptured, then the motherboard is pretty much history. You could 'recap' it, but at that point, it'd be cheaper to buy (or scrounge) another old machine instead...
73 DE N4RPS
Rob
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