C3742U. Where can I get a replacement power cord?

Try another power adapter for a USB device. If this is the type unit you are referring to, it looks like it has a power/charging adapter as well as the USB cord? Those are pretty much standard with a few exceptions. The cord rarely fails but a power adapter sometimes fails.

eBay shows a lot of available replacements.

Also, make sure the electrical outlet is live. Do other things plugged into the outlet work?

And, if the power adapter has a fuse in it (can't tell from these listings), make sure it is not blown.

https://www.ebay.com/itm/US-SHIP-Charger-Power-Cable-Cord-For-Fuhu-Nabi-DreamTab-DMTab-Jr-XD-Kids-Tablet/201811395275?hash=item2efce582cb:m:mPmUhItDnfyw9Cp7Kqg09EA

try amazon or ebay i get my tablet chargers from them places

Yes...just replace the power cord and you will be good to go.

Have you checked the following:

1. Power cord for breaks
2. The power outlet you are connecting into (try at least 2 other outlets before settling, but use different outlets for the sake of argument.
3. When was the last time you charged and it actually did?
4. Do you have the correct cord?
5. Have you tried to replace the cord?

You could go to the place you bought it or another tech store and see if they have another tablet like yours lying around so you could test out and see if it is just your power cord that needs to be replaced. Because most likely it's time to buy a new power cord. Hopefully you didn't fry the tablet's motherboard also that's why you should test out the power cord first.

You Power Cord must be bad. If you cannot get on the laptop by using just the power cord, then the power cord is bad and needs to be replaced. Also it sounds like you've been operating off your battery since the power cord is bad, but now the battery is dead because the bad power cord was not charging it.

Get a new AC Adapter and Power Cord. Or it could be that the pin where you plug the power cord into the table is damaged or broken.

Ok here's what you will do

1) Unplug the notebook from the ac adapter (charger power cord)

2) Take off the battery pack on the notebook

3) Once the ac adapter and battery is off the notebook, hold down the power button for 15 seconds

4) After 15 seconds, let go of the power button

5) Now plug in the AC ADAPTER (OR CHARGER POWER CORD) ONLY (DO NOT PUT BACK THE BATTERY PACK)

6) Now press the power button once.

7) If the unit boots, the unit suffered a slight surge

8) If the unit does not boot and remains dead, the unit suffered a severe surge and may be burned out and needs replacing

I hope this helps and let me know how it goes afterwards

Have the power adaptor checked by an electrician, most probably you will need a replacement.

If you establish that the adaptor is working, then something happened to the battery charging circuitry in your Asus and it will need repair.

If it's still under warranty, then you are good, otherwise it would be better if the adaptor alone failed, as replacement adaptors are rather inexpensive compared to laptop repairs.

That definatly sounds like you need to replace the jack for sure....I have fixed two toshiba's with the same problem myself. To get it done in the store you are probably looking at $150-300. Least that is what it was here. So i decided to buy the part i needed off ebay, take the laptops apart and resolder the jack on.