I had a 65 watt power chord with my laptop.But it broke.I just got the same number, but it is 20 watt. Will it still work on my laptop? Because the laptop lights aren't turning on so far to say they're charging!!
laptop charger cords look like they are universal - but as you already know, there are different power ratings - depends on the manufacture and models. Providing too little power can cause devices to overheat and malfunction. Sorry, but get the exact replacement cord, likely that 65watt .
Most regular laptops use 40W just to run, then 60W to run and charge at the same time. 20W might be enough to charge but not enough to run it. If 20W is enough to charge, you can turn the laptop off, charge it, then use the battery to run the laptop. No, 20W will not be enough to run the laptop if it's regular laptop. Return the charger if possible, get a 65W or bigger rating charger.