ASUS S56CA Powering up, but not seeming to post

bigguyjake

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May 3, 2010
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Hey everyone,

So my wife's 4 year old ASUS Laptop is powering up, but the LCD will not turn on. According to ASUS registration it is a K56ca, but the sticker says S56ca. I believe it is a 15 inch which had windows 8 on it originally, I updated it to windows 10 two years ago. 4gig ram. So the problem is that it is powering up and the CPU fan is running. However the screen won't turn on and when I tried plugging in an external monitor it didn't work either. I pulled it apart and reconnected the HDD and RAM. I pulled the battery and held the power button and powered it back up. Still nothing. I did notice the CPU and WIFi LED's are flashing alternatively, but can't find any resource that would identify if that is a MOBO code. I am just trying to figure out if the MOBO is shot and it's time to move on or not. If I can fix it i'd rather do that. Anyone have any ideas or might have a link to the LED status codes?

Thank you in advance.
 
Solution
When you connected the external monitor, did you do it this way? (I ask because if not done like this it often won't work).

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...
When you connected the external monitor, did you do it this way? (I ask because if not done like this it often won't work).

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.
 
Solution