test a power wupply without a voltmeter
OK so yesterday i got this broken laptop from someone. I knew the problem was the ac jack ( it would charge if the the jack was proped up in just the right way) but only if I used a power supply that did not come with the computer. I have never soldered anything in my life but figured what the heck. I took the laptop apart and located the AC jack. Since I do not have the cash flow to buy a new AC jack I decided to experiment and just reflow the solder on each post of the jack.
Well things went well.....I think. The problem is this. When I plug in the power supply the "charge" led comes on for just a second or two and shuts off right away. But there is further information about this power supply. It is putting out 3 volts less then the original power supply. Could this be the cause? The think the OEM power supply is dead because I have nver been able to get the computer to do anything with that one. Is there a way I can test this power supply without a volt meter or any other product to plug it into?