Laptop BLACK SCREEN, FAN WORKING

[andrewKode]

Hello guys, I have a problem with my Asus K56CM. It started today and I don't know how to fix it. So what happened: I normally turned my laptop ON and suddenly the BIOS came up asking me what to do: Boot from SSD or Enter Setup. So I chosed Enter Setup and then everything went wrong. Now my laptop turns on, the LED turns on, the HDD LED turns on only in the beginning but there is no signal on the display. That stays off. Also after a while, like 5 seconds, the fan starts too.
I think my GPU is broken. I have an integrated GPU and a dedicated one.
Any idea? So far I've tried to remove the RAM, the HDDs, the BIOS battery...but nothing. The screen stays off no matter what I do.

 

[andrewKode]

Here is also a video showing what's going on. If I plug the HDDs in the fan starts immediately. But it doesn't want to show anything on the screen...
https/youtu.be/vXQs28SkbA8

 

[webworkings]

Try this...

1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. Turn on the laptop.

NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.

If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.

If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.

 

[andrewKode]

Try this...

1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. Turn on the laptop.

NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.

If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.

If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.

Thanks for the reply, I did that and no...there's nothing there. But why is the HDD Led not blinking? It shows no activity there... it just stays like that.

 

[webworkings]

Is there anything at all on the screen? Mouse, cursor, blinking white line, etc.?

It is possible that nothing is happening hence the not blinking. It would depend on for how long that goes on. Or if it does blink occasionally and it just isn't noticed.

 

[andrewKode]

There is nothing on the display. It stays off, just like it's not being connected.

 

[webworkings]

Well, if the device is not under warranty, either you or someone you take it to, can open it up and check the connections.

If it is under warranty still, then contact the manufacturer instead.

 

[andrewKode]

Well, if the device is not under warranty, either you or someone you take it to, can open it up and check the connections.

If it is under warranty still, then contact the manufacturer instead.

It's the BIOS, it got corrupted. Think about it: It showed up without reason and it asked me to select an action: boot from ssd or enter setup. After that boom! Black screen, dead. I don't think it's the GPU anymore, it's the BIOS.
Now, how can I recover it? I've found some ways using a usb and CTRL+HOME but that didn't work..
I think I will send it to service and let them rewrite the BIOS chip.

 

[webworkings]

Here are a couple of ways you can reset the BIOS.

1. Resetting through CLEAR CMOS Motherboard Jumper

Many motherboards contain a 'jumper' that you can use to clear CMOS settings, if your BIOS is not accessible.

The exact location of the jumper can be found in the motherboard’s (or computer’s) manual. You should check your manual for instructions if you want to use the motherboard jumper.

However, that said, how to do this is quite similar on all computers.

First make sure you have turned the computer's power switch to off, this is to make sure that it is not getting any power at all. Then open the case and locate the jumper. It will be named something like CLEAR CMOS, CLR CMOS, CLEAR, etc., and it will often be near the CMOS battery.

Please be sure you are grounded before you touch the motherboard so you don't damage the motherboard with any static electricity. You will then set the jumper to the "Clear" position. Next you will turn on the computer and then turn it off again. Now set the jumper back to its original position and you should be done.


2. Reseat the CMOS Battery

If by some chance your motherboard doesn't have a "CLEAR CMOS" jumper, you can try to clear its CMOS settings by removing the CMOS battery, and then replacing it.

The CMOS battery provides the power used to save the BIOS settings. This is how your computer knows how much time has passed even when it’s been turned off for a long time. Removing the battery will remove the source of power and clear the settings.

NOTE: Not all motherboards have removable CMOS batteries. If the battery won’t come loose, do not try to force it. You could end up having to replace the motherboard if you do.

As with the jumper change, make sure the computer is completely off and had no connected power. Also make sure you are grounded before you touch the motherboard. Now you want to find the round, flat, silver colored battery on the motherboard. Very carefully remove it. Wait five minutes (or more, but not less) before reseating the battery.

 

[andrewKode]

I removed the CMOS battery and still no effect.

 

[webworkings]

Well then resetting isn't the answer. I would take it in then.