General Discussion > Computer Usage and Setup Help

Help Testing a Laptop PSU IC

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Vogtinator:

--- Quote from: CalebHansberry on November 17, 2014, 11:49:12 pm ---Hmm, I'll try. If you have any suggestions as to how to try to measure the battery voltage that'd be fine, though I'll certainly try to do my own research. Will I accidentally blow up the battery if I somehow short it? (well prolly not since it prolly has no power)
--- End quote ---
It could have enough voltage to spark, so be careful.


--- Quote ---And if I succeeded in doing this - would that test the motherboard's ability to send power, or the battery?
--- End quote ---
Just try to find the battery contacts for + and -. You can always test from which side the voltage is coming from using a diode.

CalebHansberry:
Hi, sorry I'm posting so late.

I measured + and -, and here's what I got: 9v sometimes when it's plugged in, but often 0v. Unplugged there was a chance it'd read 0.01V but prolly nothing. So, does this information help in determining whether the laptop or the battery is at fault?

Vogtinator:
It doesn't help much, a laptop's power circuit is a complex piece. Did you measure the supply while it's not plugged in?

CalebHansberry:
Could you rephrase what you mean? I did measure the pins on the laptop heading to the battery while the battery wasn't plugged in, which yielded 0V generally

Vogtinator:
Well, the laptop won't try to charge a battery if there's no battery plugged in.
If you get 9V if the battery is plugged in, it's certainly broken. It's by far not enough (and not a multiple of 3.7V).
Is there voltage if the laptop tries to charge?

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