Won't turn on

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ASUS Q405U

The ASUS Q405U is a laptop produced by ASUS that was released in 2017. It is Intel Generation 5, uses Windows 10 and has many connectivity options.

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Cassandra Dover @cassandradover

Rep: 11

Posted: May 3, 2024

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Won't turn on

The notebook not coming on.

When the AC power cord is plugged in the charging light comes on & it's a constant white light. (which means the battery is charged 95-100%)

But when you press the power button it flickers one time and doesn't come on. Also, the charging indicator will flicker off and then come back on as a constant white light after a minute.This is while plugged in.

When the AC power cord isn't plugged in. The power indicator flickers and nothing comes on.

Can someone help me ?

Answered! View the answer I have this problem too

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does your charger show any signs of wear or have a loose connection?

if not, does the charge port on the laptop feel loose?

May 3, 2024 by Viscous

No there's no loose connection. The power cord is in great condition. Nothing feels loose near the port

May 3, 2024 by Cassandra Dover

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oldturkey03 @oldturkey03

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Posted: May 4, 2024

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@cassandradover Start off with the easy things. Disconnect the power from the computer by unplugging the power cord from your computer. Disconnect all external devices from the computer. Remove the battery Now hold the power button depressed for about 30sec-1min. Reapply the AC power adapter and see if your computer does show any sign of life.

This "power indicator flickers and nothing comes on" sounds like a bad battery. Get an ammeter and see if your laptop draws any amperage from the charger. After that, you need to check and see if your motherboard even gets power. You will also have to check the switch as well For that of course, you need to open it up. Post Some good pictures of what you see. That way we can see what you see. Adding images to an existing question

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Okay when you say remove the battery. Do you you want me to open up the laptop and disconnect the battery?

Aug 25, 2024 by Cassandra Dover

@cassandradover if you can. Use this guide ASUS Q405U Battery Replacement to get to it. Now you are already half way there and it might be a good idea to do the ammeter checking, to see if our battery still draws a charge. If not, I'd replace the battery anyhow,

Aug 25, 2024 by oldturkey03

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does your charger show any signs of wear or have a loose connection?

if not, does the charge port on the laptop feel loose? — Viscous
No there's no loose connection. The power cord is in great condition. Nothing feels loose near the port — Cassandra Dover
Okay when you say remove the battery. Do you you want me to open up the laptop and disconnect the battery? — Cassandra Dover
@cassandradover if you can. Use this guide ASUS Q405U Battery Replacement to get to it. Now you are already half way there and it might be a good idea to do the ammeter checking, to see if our battery still draws a charge. If not, I'd replace the battery anyhow, — oldturkey03

ASUS Q405U

Won't turn on

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