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G731GW Power Adapter connecting and disconnecting

Level 7

I read on the Forum somewhere this recurring problem where the power adapter is plugged into the laptop and the screen says Plugged in; then it says Battery; then it says Plugged in repeatedly. I have this issue with my G731GW, too.

The report goes on to say that it isn't the adapter, the battery, or the port. The final assessment is it is a disconnect on the motherboard itself. Mine must be a partial disconnect, because as long as I plug it in--it verifies--and I don't even breathe on it, it charges.

I'm in the middle of a timed project at the moment. Then, the laptop could go to a repair shop to see what's what.

My question: Can the USB C on the back of the laptop be used to charge the laptop? I can imagine that it cannot be the same charge as, say, an Apple ipad, to charge the laptop.

Any thoughts, opinions, or advice appreciated.


The included power adapter is 280W. USB cannot supply anywhere near that amount. Hence a lot of gaming laptops don't support USB charging because it is insufficient. I'm not sure if yours supports USB but even if it does it will be a trickle.
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XanaduQ wrote:

My question: Can the USB C on the back of the laptop be used to charge the laptop? I can imagine that it cannot be the same charge as, say, an Apple ipad, to charge the laptop.

If you refer to the G731GW user manual p24 below, it mentions the rear USB type-C connection only supports data transfer and display output, so unfortunately cannot be used to charge the notebook.

If you want to compare with some newer ROG gaming notebook models, the user manual will provide the specifications of the USB type-C power adapter when it can be used to charge the notebook although as xeromist mentioned, the wattage of the USB type-C adapter will not be the same as the original barrel-plug AC adapter, so it would not be able to replace it, but it can be used to charge the battery when the notebook is turned off.

Level 7

I think it is the port. I have been having the same issue with my G731GU. I initially bought a new charger and worked fine... for a while. Then it started to happen again. I do not recommend this UNLESS you are mechanically competent and willing to take a chance at breaking something... but what I do when it happens is first, take a small screwdriver and expand the pins in the port. I then squirt some contact cleaner into the port just in case there is any corrosion. I also do the same to the inner part of the connector. It will once again work. 

I am not sure if the connectors are not making good contact or if there is corrision on the pins, but appears to be a bad or high resistance connection, at least on the 731. 

One hint, DO NOT put too much pressure on the pins if you choose to try it... looks like the port is a pain to replace. 

Level 7

Same Problem here with a G713RW.

My observation is, when using the NVidia Graphics Card, the Power Cable and Connector gets very hot and at some point the Notebook switches between plugged in and not connected/battery Mode regularly, to a point, where it switches every second.

This even happens, when fhe Notebook rests on the table and is not moved in any way.

If i put the Notebook in a position, where the Power Connector Cable can hang down (thus is not behind the hot fan outlet) Problems are gone.

I opened a quality issue with ASUS.

My guess is, that the Power Connector Cable or Connector heats up to a point, where the elecitrical properties are negatively influenced or even worse, the solder of the Power Connector connection to the Mainboard is softened. The measure of heat dissipating from the fan outlets is definetly very high.