Circuit diagram laptop charger

Why?
Chargers are so cheap that it is not worthwhile & even unsafe to repair. Just buy a new one.
If you still want to repair, you really do not need a circuit diagram. Just replace swollen (bulging) capacitors and resolder the output cable. Cable is usually broken at the "bending point".

Adapter arrived promptly, but did not have a "dongle." Seemed to work well for about 6 months but then did not charge laptop battery and only worked plugged in. Eventually a computer technician friend pointed out the adapter was too light to be real - compared my original adapter it weighs about half the weight. Not very impressed and would not recommend. I have no complaints about this item whatsoever, for all intents and purposes it does everything my original AC adaptor did.
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del recognition circuit may have failed in charger , or could be fine central pin on charger plug or laptop plug has broken connection,it is used to tell laptop that this is genuine dell charger.If you remove battery will laptop work off charger.if does then definitely one of the three problem possible . for first only soln try another dell charger first,often has to be one to suit your model ,common dell problem ,if then work and charge battery ,you will need to replace charger as recognition circuit failed. If either of last 2 can repair but need to pull apart repair broken connection ,or open up laptop and check power connection and repair connection . If you remove battery will laptop work off charger.if does the definately one of the three problem possible . for first only soln try another dell charger first,often has to be one to suit your model ,common dell problem ,if then work and charge battery ,you will need to replace charger as recognition circuit failed.

Hello. There is a hardware failure with the laptop not your acer 4730 AC charger. AC chargers have some range of protections of their own. If the power requirements of the laptop are bigger then what the charger can handle, the charger will turn off. Also other parameters can bring the charger offline. In your case, you have a problem with a small chip, the battery charge controller unit, witch regulates the amount of current required to propperly charge the battery. When this thing fails, the charging requirements for the battery are reported rong and the AC charger is forced to give more power then necesary. This results in disconnection of the AC charger ( an internal fail safe of the AC charger) and the laptop to swich back to battery power. When the laptop is turned off, it can charge the battery because the power requirements are low, having all processor, main board, hard disk etc turned off. Therefore the AC charger can handle the load. However you will need to have it checked by a service center as it is a hardware fault. Both AC charger and laptop needs that check. The charge controll circuit needs to be replaced probably. It will be a somewhat expensive repair. Don't buy any other battery untill you have the laptop checked.

your f**ked

This is really a common problem with computers these days. It may be caused by a number of reasons like a faulty charging system, faulty battery or anything burned out on the computer's system board. But in this scenario, i would suggest the following
1. Remove the battery and connect the laptop with the AC adapter only and see if it will respond.
2. Remove the AC and re-connect the battery and try to turn it on
3. If the above two do not work, then consider changing the AC adapter for your laptop. You can try to use a different AC adapter that has the same rating as your laptop's. The problem might be with the Charger.
4. But if all this does'nt work, consider getting a Computer Technician who can open up your computer and check the circuit board, there might be a problem with one of the chips

lenova laptop charger not working,short on the circuit

Get a new charger. They are pretty cheap. They are notorious for burning out. If that doesn't fix it then the motherboard is bad. But I'd assume the burned out charger.

either ac adapter is dead or the power socket of the notebook is defective and power is no longer charging the battery. if you have a multimeter, test the ac adpter for power.if thers is power then wiggle jack maybe temp charge. i can fix, 7863893088

try connecting a known good ac adapter if fails then remove battery then try it again if still fails then replace the motherboard.