Laptop will not power on

The connector that plugs into the laptop gets loose or the wires come off the terminals in the insulation. Find yourself a replacement or if your good with a soldering iron then you can try and fix the connector from the power pack. Sometimes the power plug on the laptop needs to be replaced does the plug seem sloppy when you plug it into the laptop if so then you can take it to a local PC repair shop and it's a cheap fix, if not grab a replacement power pack eBay has them fairly cheap as new replacements.

Hello

Well the first thing you should check is the amount of power output to the power supply. for example the computer needs 12V but the AC Adapter only gives 9V.
If that's not it then the actual green light is not receiving that information from the motherboard. that's not an issue if the battery get's filled up and the laptop works normally . If you notice that the laptop tends to shut down quickly when it's not plugged in then the battery is worn out. These things happen since the a laptop battery becomes very inefficient after 2-3 years.
One more thing - try to rotate the input end of the ac adapter cable. maybe it's not making good contact inside the laptop.
Hope this helps.

Unfortunately, the bad caps may have been replaced with the same cheap parts that were originally used.
Modern power supplies have parts subjected to relatively high frequencies (kHz range- 50-150k) which electrolytic capacitors don't tolerate well and causes the chemicals to break down reducing the capacitance to shrink and their equivalent resistance to rise until they cannot handle the signals they must process.
When these are replaced, the new parts should be rated for switching power supply use, have at least 105C temperature range and low ESR. Even then, there is no guarantee that the manufacturer is truthful or conscientious. Even the poorest of this kind of part may perform OK for some time before they fail. Parts originating in China may even contain defective chemicals when new and they make the bulk of this kind of part today.
There are ways to prevent capacitors from failing but they must be made well to begin with and adding certain parts (less than a couple of dollars in cost) to the circuit can reduce the exposure to high frequencies that causes even good parts to fail early.
You might consider buying a new supply for your set and just rotate them when they fail to avoid being dead in the water, sending the failed one for repair.
Switching power supplies are much more efficient than the linear supplies used 20+ years ago and can be as reliable as those if designed well and built with true quality components.

The weakest part on the laptop is the power jack and the external power supply pack.

Pay close attention to the POWER ON indicator.

A loose jack will has a intermingling power indicator when you move the jack or the cable.

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When the power go off at the laptop screen,check the temperature of the power pack.

It should be warm to the touch.

If you has access to a digital volt meter then check the reading and compare to the voltage specification label.

It should read 1 to 2 volt above the spec on open circuit.

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A failing power pack will generate an small buzzing noise.

Mostt batteries have an issue of SHELF LIFE and so if the battery that was given to you was on SHELF for a long time then it can develop BACK EMF and so will not charge to the limit designed. So check the date on the pack and if this is more than 6 months ago , it is better to claim for a refund or replacement. If your camera did not have any other issue this is the only possibility.
The first charge also must be done for 8-15 hours.

You either have a faulty power supply. If you have another one try it if not I would suggest replacing the power supply.

If the fault still remains with another power supply then you have a bad connection on your system board which you will have to replace.

Hope this helps

I would look online and see if you can buy a new power cord. That is your problem. that same thing happened to my laptop a few months ago.

Sounds like overheating, if the machine just cuts off its either power fault or overheat and the machine will hit a certain temp about 90C for a period and cut out to prevent severe component damage .
you can try cleaning again, the thing is if its been running at high degrees C it may need fresh arctic silver on the CPU which thankfully is a pretty robust one in that machine.

hope this helps, let me know if you need further help

Hello Sarah, I brought mine in Europe too and found out that they are rated for 220 VAC while in the US you will need a 110 VAC power adapter so if this is your case you need to buy a replacement.

acer aspire 3680 no power on, found 2 short circuited surface mount capacitors on motherboard replaced lapton power on works fine. Edward